The CAMEO® Software System
\
       MARPLOT
       USER'S MANUAL
       February 2007
U.S. ENVIRONMENTAL PROTECTION AGENCY
Office of Emergency Management
Washington, D.C.

NATIONAL OCEANIC AND ATMOSPHERIC
ADMINISTRATION
Office of Response and Restoration
Emergency Response Division
Seattle, Washington

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Terms  and  Conditions  for MARPLOT®
The recipient of the MARPLOT software and documentation agrees to the following guidelines and
restrictions:

Limitation of Liability
The United States Government has used its best efforts to deliver complete data incorporated into
MARPLOT and its associated map files. Nevertheless, the United States Government does not warrant
accuracy or completeness, is not responsible for errors and omissions, and is not liable for any direct,
indirect, or consequential damages flowing from the recipient's use of MARPLOT.

The MARPLOT software is being distributed "as is" and the United States Government does not make any
warranty claims, either express or implied, with respect to the MARPLOT software, its quality, accuracy,
completeness, performance, merchantability, or fitness for any intended purpose.

Indemnification
Non-governmental recipients shall indemnify and save harmless the United States and its agents and
employees against any and all loss, damage, claim, or liability whatsoever, due to personal injury or death,
or damage to property of others directly or indirectly due to the use of MARPLOT by the recipient, or any
other act or omission of the recipient, including failure to comply with the provisions of these terms and
conditions.

Maintenance
Recipients should keep EPA/NOAA informed of any changes to their contact information. This
information is necessary so that the United States Government may notify users of any MARPLOT
program changes or if updated information becomes available.

Trademarks
CAMEO®, ALOHA®, MARPLOT®, and LandView® are registered trademarks of the United States
Government.

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                        Table of Contents
Chapter 1: Welcome to MARPLOT	11
      About MARPLOT	11
           Key program features	11
           MARPLOT'S menu bar	11
           Getting help	12
                 In Windows	12
                 On a Macintosh	13
      How to use this manual	13
      Basic MARPLOT concepts	13
           Objects	13
           Layers	14
           Maps	14
           Relationship between maps and layers	14
           Views	15
           Search Collection and selected objects	15
           Linking objects to data in other programs	15
           Object identification	16
           Administration and user permission	16
           Some mapping concepts	17
                 Scale	17
                 When to show? When to label?	17
                 Latitude and Longitude	18
      TIGER/Line database andLandView	19
           Accuracy of the TIGER/Line database	19

Chapter 2: Guided Tour	21
      Showing different layers	21
      Navigation and views	29
      Searching for cities and roads	35

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                                                                Table of Contents
Chapter 3: Reference	41
      MARPLOT display window	41
             Pop-up menus on the map window	42
             Map insets	43
                   Reference view	44
                   Legend	44
                   Scale bar	44
                   Time stamp	44
      File menu	45
             Save as Picture	45
                   Save as Picture in Windows	45
                   Save as Picture on a Macintosh	45
             Print	46
             Import	46
             Export	47
             Compact Map Files	47
             Preferences	48
             Administrator	51
      Edit menu	51
             Undo	51
             Cut, Copy, and Paste	51
             Clear	52
             Insert Picture Object	52
                   Inserting the picture object	52
                   Geo-referencing the picture object	53
                   Finishing up	53
             Make New Polygon	53
             Make New Polyline	54
             Polyline <-> Polygon	54
      View menu	54
             Go to View	55
             Go to Previous View	56
             Set Scale	56
             Go to Lat/Long	56
             Center on Focus Point	56
             Save Current View	56
             Edit Views	57

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                                                            Table of Contents
       Entry View	57
       Reference View	57
       Legend	58
       Scale Bar	58
       Time Stamp	58
       Lat/LongGrid	58
       Marked Point	58
       Redraw	59
List menu	59
       Search	60
       Search Collection dialog box	62
       Intersections dialog box	64
       Addresses dialog box	65
       Show Search Collection	65
       Copy to Search Collection	65
       Layer List	66
             Layer List groups	69
             Layer Scale Ranges dialog box	70
       Map List	71
             Map Info dialog box	73
Objects menu	73
       Object Settings	73
             Geo-referencing a picture object	75
       Segment Settings	75
       Vertex	76
       Move Objects to Layer	77
       Move Objects to Map	77
       Color	77
       Line Width/Pattern/Style	77
       Fill Pattern	78
       Symbol	78
Sharing menu	78

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                                                                  Table of Contents
      Tools	78
             Arrow tool 	79
                   Selecting Objects	79
                   Moving Objects	79
                   Resizing Objects	79
                   Options	79
             Hand tool	80
             Zoom-in tool 	80
             Zoom-out tool  	80
             Distance tool 	80
             Symbol tool 	81
             Rectangle tool  	81
             Circle tool 	81
             Polyline tool 	82
             Polygon tool 	82
             Text tool 	83

Chapter 4: Examples	85
      Adding maps	85
             Introduction	85
             Copying a map into the MARPLOT folder	85
             Using Find New Map	86
             Using maps on aLandView CD/DVD	87
             Downloading a map from aLandView CD/DVD	88
      Searching and the Search Collection	90
             Using the arrow tool to search	90
             Using the Search Criteria dialog box	93
             Saving a Search Collection	94
      Adding and modifying objects	97
             Layer locking and user permission	97
             Changing the fill pattern of city polygons	97
             Creating different types of objects	101
             Creating a new layer	106
             Moving objects between layers and maps	107
      Editing road segments	108
             Extending a street and making an intersection	108
             Modifying address ranges	115
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                                                                Table of Contents
      Using picture objects	116
             Adding a picture object with geo-referencing	116
             Adding a picture object without geo-referencing	123
      Generating output	125
             Printing	125
             Saving a picture	126
                   On a Macintosh	126
                   In Windows	126
      Transferring map data	126
             Copying maps and map files	126
             Using Export and Import	127

Chapter 5: Quick Help Diagrams	129
      MARPLOT folders and files	129
      Menus	130
      Map window	133
      Map window with an unlocked layer	134
      View dialog boxes	135
      Layer List	136
      Layer Scale Ranges	137
      Map List	138
      Search Criteria	139
      Search Collection	142
      Intersections	143
      Addresses	144
      Object Settings	145
      Segment Settings	146

Chapter 6: Administration	147
      Keeping backups	147
                   Maps that are edited	147
                   Maps that are not edited	147
                   MARPLOT application file	147
                   USERS folder	148
                   Views and Search Collections	148
                   MARPLOT settings files	148

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                                                            Table of Contents
      Adding maps to your MARPLOT system	148
            Adding maps from the Internet	148
            Adding maps from LandView disks	148
      Exchanging data with other MARPLOT systems	149
      Administrating a multi-user MARPLOT system	150
      Using MARPLOT maps on a network	151
      Creating new maps	152
      Creating custom maps from other sources	152

Chapter 7: Troubleshooting	153

Appendix: MARPLOT  Symbols	157

Glossary	163

Index	167
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                    Welcome to  MARPLOT
            This chapter contains an overview of MARPLOT®, an explanation of how to use this
            manual and MARPLOT'S on-screen help, and a discussion of basic concepts.
About MARPLOT


Key program features
MARPLOT (Mapping Application for Response, Planning, and Local Operational Tasks) is a general-
purpose mapping application program with the following features:
  •  Easy-to-use GIS interface;
  •  Ability to add objects (such as schools or chemical
     facilities) to the map and mark them using
     MARPLOT's set of symbols or an inserted picture;
  •  Allows you to customize the maps by specifying
     which layers appear and whether objects in those
     layers (such as roads) are  labeled;
  •  Simple, all-inclusive search mechanism for map
     objects;
  •  Links objects on the maps to data in other
     programs, such as CAMEO® and LandView®;
     and
  •  Easily displays ALOHA® threat zones.
MARPLOT was developed jointly by the National
Oceanic and Atmospheric Administration (NOAA) and
the Environmental Protection Agency (EPA).

MARPLOT'S menu bar
You can perform operations on MARPLOT maps using these menus:
  •  File: Choose items from the File menu to perform basic operations (such as printing and setting
     preferences) and administrative operations (such as importing/exporting, compacting map files, and
     setting MARPLOT to multi-user mode). For more information, see "File menu" on page 45.
File Edit View List Objects Sharing Help
•r Focus Pt: 38°49'21"N  77°33'36"W -r 1:46926
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                                                         Chapter 1: Welcome to MARPLOT
   •  Edit: Choose items from the Edit menu to (a) undo the last object change you made, (b) delete an
     object, (c) insert a picture object (such as a logo) onto the map, and (d) create new polygons and
     polylines. For more information, see "Edit menu" on page 51.
   •  View: Choose items from the View menu to (a) navigate around the map, (b) save and use views,
     and (c) use the map insets and other map window displays. For more information, see "View menu"
     on page 54.
   •  List: Choose items from the List menu to (a) perform database searches, (b) work with the list of
     found objects (called the Search Collection), and (c) access the list of layers and the list of maps. For
     more information, see "List menu" on page 59.
   •  Objects: Choose items from the Objects menu to (a) get information about objects, (b) adjust vertex
     settings, (c) move objects to a different layer or map, and (d) modify an object's graphical attributes.
     For more information, see "Objects menu" on page 73.
   •  Sharing: Choose items from the Sharing menu to share information with other programs, such as
     ALOHA, and CAMEO, and LandView. For more information, see "Sharing menu" on page 78.
   •  Help: Choose items from the Help menu to see the help topics list and to get information about
     MARPLOT.

Getting help
On-screen help is available when MARPLOT is running. The list of help topics can be accessed through
the Help menu. Also, most screens have Help buttons that take you to a screen-specific help topic.
     ;M*RPLgTHBlp
    File Edit Bookmark  Options Help

    Contentsf -ntteli I Back I  -'** I
               MARPLOT! Help Topics
Insert Picture Object
o
Do you want to insert a picture as an object
on an already-existing map, or as the first
object on a new map?
Use Existing Map
Make New Map

Cancel
,-™-™-™-™-J™J^

In Windows. To see the list of help topics, select Topics from the Help menu. When the list appears,
click any topic name to view a discussion of that topic. When you've finished reading about that topic,
click Contents to return to the list of topics. When you are ready to go back to using MARPLOT, close or
minimize the Help window.
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                                                       Chapter 1:  Welcome to MARPLOT
On a Macintosh. To see the list of help topics, select Topics from the Help menu. When the list appears,
highlight a topic name, then click Select to view a discussion of that topic. When you've finished reading
the help topic, click (a) Topics to return to the list, (b) Cancel to close the window, (c) Copy to copy the
help text to the clipboard, or (d) Print to print the help text.
How to  use this manual

This manual includes seven chapters. Begin here in Chapter 1 by reviewing a discussion of basic concepts.
Turn to Chapter 2 for a step-by-step MARPLOT tutorial. Chapter 3 contains explanations of each of
MARPLOT'S menus, along with information about the map display window and all of the MARPLOT
tools. Turn to Chapter 4 for MARPLOT example problems and refer to Chapter 5 for some quick help
diagrams. Chapter 6 includes information for MARPLOT administrators (system managers). Review
Chapter 7 for trouble-shooting advice. At the back of the manual, you'll find an appendix with MARPLOT
symbol information, a glossary, and an index.
        Other sources of MARPLOT information

        This manual is one of three important sources of information about MARPLOT. The
        other sources are the on-screen help and the MARPLOT Technical Documentation.

        You can access the on-screen help as you use MARPLOT. By using the Help buttons on
        many of MARPLOT'S dialog boxes, you can get immediate information about the
        function you are currently performing.

        The Technical Documentation gives details about the formats of the various files used by
        MARPLOT, including the MARPLOT Import/Export (MIE) format. It also contains a
        list of interapplication communication (IAC) messages MARPLOT sends and
        receives.
Basic MARPLOT concepts

The rest of this chapter is an overview of key MARPLOT concepts.


Objects
Objects are the basic map elements that MARPLOT draws and lets you manipulate. There are seven
different types of objects: points (symbols), rectangles, circles, polygons, polylines, text labels, and picture
obj ects. You might use a point obj ect to mark the location of a facility or accident site. Polylines are used to
represent things like roads and streams. Polygons are used to represent things like parks or water bodies.
MARPLOT provides functions for creating, examining, and modifying each type of object. The objects are
organized into layers and maps.
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                                                         Chapter 1: Welcome to MARPLOT
Layers
A layer is a category of objects. For instance, a layer called Roads might contain a large number of polyline
objects representing roads. A layer called Facilities might contain point objects representing the locations
of facilities. Although a given layer often contains only one type of object, this is not necessarily the case.
For instance, a layer called Water might contain some polyline objects representing streams and some
polygon objects representing larger water bodies. It is useful to organize objects into layers because then
you can operate on the objects in a given layer as a group. For instance, you might choose to hide or show
all of the roads. Or you might want to select all or some of the facilities to get information about them. It is
possible to move an object from one layer to another, but an object can be on only  one layer at a time.


Maps
A map is a folder on your computer—often located in the same folder as the MARPLOT application
program—that contains several files. These files contain the objects on the map. Often, a map covers the
area of a single U.S. county, but maps can be much smaller or much larger than that. It is possible to
expand maps by adding new objects to them, or shrink them by removing objects.

You can have any number of maps in use at a given time. If you use MARPLOT to view an area that
intersects with more than one map, all maps in the displayed area are drawn simultaneously on the  screen.
In fact, it is possible for the geographical areas covered by two or more different maps to overlap. All of
the maps that MARPLOT is aware of are always present, and there is no need to close one map before
opening another to view it. However, it is possible to put a map out of use, so that it is not drawn on the
screen. In most cases, you do not need to be concerned with the fact that the image shown on the screen is
actually a composite of two or more MARPLOT maps. For convenience, when the distinction between
maps is not important, we often refer to the collection of maps shown on the screen simply as "the  map."


Relationship  between maps  and layers
We have said that layers contain objects, but also that maps contain objects. The truth is that each
MARPLOT object is on a particular layer and on a particular map. For instance, you can have a road object
on the Roads layer of the LA County map, or you can have a river object on the Water layer of the  Orange
County map, or you can have a park object on the Miscellaneous layer of the Orange County map.

In most cases, you will think primarily in terms of layers and secondarily in terms of maps. For instance,
suppose you are using MARPLOT'S search function to find "Park Ave." You know that "Park Ave"  will be
found on the Roads layer, so you would choose to limit the  search to that layer. As for the map(s) to be
searched, however, you can generally specify simply the "Map(s) in View." Even if you have more than
one map, it is most common to search for an object on the map that you are currently looking at.

The main point to remember is that for the most part when using MARPLOT you can think in terms of
layers (in terms of the type of object) and not worry about the fact that there is more than one map.
However, for certain operations, such as when searching for a road when several maps are in view, you can
greatly increase efficiency by specifying a particular map whenever possible.
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                                                          Chapter 1: Welcome to MARPLOT
Views
MARPLOT provides a number of tools for navigating around your maps. You can zoom in and out, shift
the view in any direction, or change the view to show a particular object or group of objects.

You can also save the area you are looking at, along with a miniature image of the map window. The saved
view can be used in a number of different ways. You can return to it at a later time. You can use it as a
reference view to help with future navigation. You can choose a saved view to be the entry view—that is,
the view MARPLOT automatically shows when it starts. Also, if your MARPLOT system is multi-user,
you can choose whether a given view that you save is for your use only, or if it is meant to be shared with
other system users.


Search  Collection and selected objects
MARPLOT provides a flexible mechanism for searching for objects (described more fully in "Search" on
page 60). You can search for objects by name or by their position relative to  other objects. You can also
limit the search to certain layers and/or certain maps. When a search is performed, the objects matching
your specified criteria are put into a list called the Search Collection. From the Search Collection, you can
choose an object and display it on the map, or look for address ranges and intersections of certain types of
objects. This Search Collection list is saved until you explicitly change it. For instance, this allows you to
return to the list to show another object. You can also save a Search Collection for use at a later time.

In addition to the objects in the Search Collection, another important set of objects includes those that are
currently selected. Every time you click on an object on the screen, MARPLOT selects that object by
drawing small red squares around it and displays its name  and other information about it at the bottom of
the window. It is possible to select more than one object at a time. The functions in the Objects menu apply
to the selected object or objects. For instance, when you choose an item from the Color submenu, you
change the color of all of the selected objects.

You can copy the objects that are currently selected into the Search Collection. Going the other way, you
can select all of the objects in the Search  Collection. Between the Search Collection and the selected
objects you have a number of mechanisms for dealing with groups of objects.


Linking objects to data in other programs
MARPLOT contains limited information about each object: the color and other graphical attributes, the
name, the address ranges of most roads, and a few other pieces of information. Most users are interested in
associating MARPLOT objects with data records in other programs, usually databases like CAMEO and
LandView. The basic procedure is to establish a link between an object in MARPLOT and a record in the
database, either through a manual or an automated procedure. Once links have been established, you can
select objects in MARPLOT and choose to go to the associated records in the database. Going the other
way, you can select records in the database and choose to view the associated objects on the map.
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                                                         Chapter 1: Welcome to MARPLOT
The specific mechanism for establishing links depends on the particular database application you are using
with MARPLOT and the nature of the associated map data. However in most cases creating and using
links involves using the Sharing menu in MARPLOT and/or the database application. For more
information about links and the Sharing menu, see "Sharing menu" on page 78 or the documentation for
your database application.


Object identification
For the most part, you will identify objects on the map by their name, layer, and map. For instance, you
may find "Fairfax Ave" on the Roads layer of the LA County map. Internally, MARPLOT has a slightly
different mechanism for keeping track of objects: it uses the layer and map name, but—instead of using the
object name—MARPLOT assigns each object a unique  identification number. For the most part, you need
not be aware of this identification number. However, it does come  into play when importing and exporting
objects (see "Import" on page 46 and "Export" on page 47) and when linking objects to databases.

When MARPLOT imports an object with the same identification number, layer, and map as an existing
object, MARPLOT replaces the existing object with the newly imported one by default. MARPLOT'S
default import behavior is designed for sharing and updating data from a source MARPLOT system to
your MARPLOT system—the idea being that the new object with the same identification information is an
update of the old object. Note: The default settings can be modified using the Options button on the Import
dialog box.

When a link is established between a MARPLOT object and a record in a database program, the database
program keeps track of the link by storing the layer name, map name, and identification number of the
given object.


Administration and user permission
Your MARPLOT system can be set up in either single-user or multi-user mode.

In multi-user mode, there is a system administrator who has the ability to give other users access to the
system by giving them a password. The administrator also chooses whether each user will access
MARPLOT with browse-level or edit-level permission.  Users who have browse-level permission can
perform most MARPLOT functions, but cannot access certain functions that have the potential to damage
or delete important map data. Users who have edit-level permission can access all MARPLOT functions,
including those that are potentially dangerous.

In a multi-user system, each user is given a folder within the USERS folder, which itself is within the
MARPLOT folder. The user's folder contains information about the user, the user's MARPLOT
preferences and layer order, any views the user has saved, and a special  user's map that the user can  edit
(even if the user does not have edit-level permission).

In single-user mode, there are no passwords and anybody who starts MARPLOT is given edit-level
permission.
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                                                          Chapter 1:  Welcome to MARPLOT
Some mapping concepts

Scale.  Among other obvious differences, computer maps like those in MARPLOT differ from regular
maps on paper in that you can zoom in or out—that is, you can view them at different scales. When we talk
about the scale of a map, we mean the size of objects on the map relative to the size of those objects in the
actual world. For instance, suppose a certain road is  one mile long. If the line representing the road on the
computer monitor is 1 inch long, we say that the scale is " 1 inch = 1 mile." If we zoom out (show more
map area on the screen) such that the line on the monitor is now half an inch long, we say that the scale is
"0.5 inch = 1 mile" or" 1 inch = 2 miles." When we talk about one scale being larger than another scale, we
mean that the first scale is "more zoomed in" than the second. For instance, the scale " 1 inch = 1 mile" is
larger than the scale "1 inch = 2 miles."

Note: You may notice that MARPLOT'S interpretation of a screen inch will not agree with a ruler laid
against your computer monitor. The discrepancy will depend upon your computer system and monitor
settings and you may not notice it unless you actually measure it. Rest assured that the scales on maps
printed from MARPLOT will be accurate and will agree with a ruler laid against the printouts.

Consider the scale " 1 inch = 1 mile." We can express this scale without reference to units such as inches or
miles. To do this we note that 1 mile is equal to 5,280 feet and a foot is 12 inches, so there are 63,360
inches in a mile  (5,280 feet/mile x 12 inches/foot). We can write our scale as "1:63360" meaning that one
inch (or one centimeter or one whatever) on the map is equal to 63,360 inches (or 63,360 centimeters or
63,360 whatevers) in the actual world.

This gives us two ways to write scales: the " 1 inch = 1 mile" format or the " 1:63360" format. Another way
of indicating scale is to specify how much area is covered by the entire map being viewed. For instance, we
can write "7 miles x 6 miles" to indicate that our computer map is displaying 7 miles across by 6 miles up
and down.

MARPLOT allows you to display the scale in any of the three formats:
   •  1 in = 1 mi,
   •  1:63360, or
   •  7x6mi.

When to show?  When to label? Certain types of map data are appropriate to display only at certain
scales. For instance, consider the network of roads in a city. When you are viewing the map at" 1 inch = 0.1
mile" or even " 1 inch = 3 miles," it may be useful to see the roads—although at the latter scale the roads
will probably be drawn very close together. When you change to a scale such as "1 inch =10 miles," it
doesn't make sense to draw the city roads, since they will be so close together on the screen that they will
appear as a solid black mass.

On the  other hand, if you have a map of the outlines  of the 50 U.S. states, it is reasonable to view this data
at "1 inch =100 miles" or a smaller scale. However, a much larger scale such as "1 inch = 1 mile" would
not be useful for viewing this data, since—being so far zoomed in—you would only be able to see a tiny
section of state boundary on the screen.
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In addition to the question of whether to display certain data at all at certain scales, there is the question of
when certain data should be labeled on the screen—that is, when should we attempt to draw the names of
the roads or the states? Even at scales such as "1 inch = 1 mile," when the roads themselves will be
distinguishable, we probably do not want to label the roads, since the names will crowd each other on the
screen and will be illegible. We'll generally only want to label roads at scales larger than " 1 inch = 0.1
mile." On the other hand, states could be labeled at much smaller scales.

MARPLOT allows you to specify scale ranges within which each layer should display. You can also
specify the scale at which labels for each layer appear (see "Layer List" on page 66).

Latitude and Longitude. In everyday conversation, we usually refer to locations by reference to other
known locations. For instance, we say "My house is on the corner of 4th and Main." MARPLOT allows
you to find locations similarly by specifying  street intersections or street addresses. However, a more
universal method of specifying locations is to use latitude/longitude coordinates. Latitude is a value in the
range of 90 degrees south (the South Pole) to 90 degrees north (the North Pole). The equator is at zero
degrees latitude. The line of 40 degrees latitude cuts across the U.S. from  Northern California to New
Jersey. Longitude is a value in the range of 180 degrees west to 180 degrees east. Zero degrees longitude is
the semi-circle that runs from South Pole to the North Pole through Greenwich, England. The 48
contiguous U.S. states are framed roughly between 67 degrees west and 125 degrees west.

Any point on the globe  can be specified by giving its latitude (how far north or south) and longitude (how
far east or west). For instance, the corner shared by the U.S. states Utah, Colorado, Arizona, and New
Mexico is approximately at 37 degrees north, 109 degrees west.

If more precise measurements are needed, we divide each degree (latitude or longitude) into 60 minutes,
and each minute into 60 seconds. (One minute latitude is approximately 2,000 yards; one minute longitude
varies from about 2,000 yards at the equator to 0 yards at each Pole.)

MARPLOT can display latitude/longitude values in three different ways:
  1.   As a degree value followed by a decimal degree fraction. For example, 40.250000° represents 40
      and 1/4 degrees,  which is the same as  40 degrees and 15 minutes.
  2.   As a degree-minute-second triplet. For example, 40°25'00" represents 40 degrees, 25 minutes and
      zero seconds. Note that is not the same value as given in the previous example: 25 minutes is almost
      half a degree, not a quarter.
  3.   As a degree-minute  pair, where the minutes have a decimal fraction. For example 40°25.50'
      represents 40 degrees and 25.50 (25 and a half) minutes.
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                                                       Chapter 1: Welcome to MARPLOT
TIGER/Line  database and LandView

Most MARPLOT users in the U.S. will work with one or more MARPLOT maps that are based on data
from the TIGER/Line® geographical database, which is maintained by the U.S. Census Bureau. Each of
these maps covers a single U.S. county or territory. For more information about obtaining MARPLOT
maps, see "Adding maps to your MARPLOT system" on page 148.

LandView is a database management system that uses MARPLOT as its map viewer. The LandView
database includes information from the U.S. Environmental Protection Agency (EPA), U.S. Geological
Survey, and the U.S. Census Bureau. LandView's collection of data (such as EPA-regulated sites and
demographic and economic information from the 2000 census) is automatically linked with the associated
MARPLOT maps and can be queried using MARPLOT'S search mechanism.

LandView is distributed on DVDs or custom CDs containing the LandView software, database
information, and maps derived from the TIGER/Line database. Because the maps are in the MARPLOT
format, MARPLOT users can use the maps on the LandView disks. For more information about
LandView, please go to http://landview.census.gov.


Accuracy of the  TIGER/Line database
The geographical data in the TIGER/Line files is derived from various sources, which themselves have
various degrees of positional accuracy. In general, you should not count on TIGER-derived map features to
have better accuracy than the established National Map Accuracy standards for  1:100,000-scale maps from
the U.S. Geological Survey (approximately +/- 167 feet). You can, however, count on map features being
in the correct location relative to one another (e.g., if a stream appears to run along the north side of a road,
it really is to the north of the road).

The accuracy of any geographical database depends on several factors. One of these is the mathematical
model of the shape of the earth used when determining the latitude/longitude coordinates of features within
the database. The coordinates in the current TIGER/Line database are based on the North American Datum
of 1983 (NAD83). A "Datum" includes a mathematical model of the earth along with a set of measured or
calculated control points. Until 1995, TIGER/Line coordinates were based on the North American Datum
of 1927 (NAD27), which was defined in terms of modeling and surveying techniques used in the 1800s.
Coordinates in the NAD83 database can differ from those of the NAD27 database by about 600 meters
(656 yards) in certain places. More information about the TIGER/Line database is available at http://
www.census.gov/geo/www/tiger/.

For more information on NAD27 and NAD83, see The North American Datum of 1983, A Collection of
Papers Describing the Planning and Implementation of the Readjustment of the North American
Horizontal Network. American Association for Geodetic Surveying, Monograph No. 2. ACSM, Falls
Church, VA. 49pp.
                                           19

-------
         Chapter 1: Welcome to MARPLOT
20

-------
                                   Guided Tour
             This section provides a hands-on guide to the most common MARPLOT functions using
             the sample map (for Prince William County, Virginia) that is included with the
             MARPLOT application. Additional examples are given in Chapter 4.
   An important note before starting the tour:
   As you move through this guided tour, you may notice that your MARPLOT screen does not
   exactly match the pictures shown in this manual. If your MARPLOT application still has the
   default preferences and other settings, then your screen will look fairly close to our example
   screens. (They may vary a bit based on the size of the window you are using or your zoom settings.)
   Even if you have modified the default MARPLOT settings, you should be able to do most of the
   exercises in this guided tour.


   Additionally, this guided tour makes use of sample objects (that is, fictitious facilities and
   hospitals) on the CAMEO Map. The CAMEO Map is a folder stored in the CAMEO folder of the
   CAMEO application. (CAMEO is one of the programs that works interactively with MARPLOT.
   For example, locations stored in the CAMEO database can be linked to a MARPLOT map and
   displayed automatically.) If you do not have the CAMEO Map, you can still follow along with most
   steps of the tour. However, there will be differences between your screen and those shown in this
   manual—namely, there will not be any icons in the northern part of the county. (If you zoom in, you
   will see that  the names of these fictitious facilities and hospitals all include the word DEMO.)


   CAMEO users: You must run MARPLOT and CAMEO simultaneously on your computer at least
   one time before going through this tour. To do this, start the MARPLOT program and then the
   CAMEO program (entering any necessary passwords). Make sure you see the CAMEO Map
   objects in MARPLOT. Then quit both programs. After having done this, the CAMEO Map objects
   will continue to appear in MARPLOT, even when CAMEO is not running.
Showing different layers
  1.   Start MARPLOT. (In Windows®, click the Start button, point to Programs, then choose the
      MARPLOT item. On a Macintosh®, double-click the MARPLOT program icon located in the
      MARPLOT folder.) Click OK on the greeting screen.
                                          21

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                                                                    Chapter 2: Guided Tour
2.   MARPLOT opens the map window. The sample map—Prince William County, VA—is shown. (If
    MARPLOT does not open to this view, use the Go to View item in the View menu, highlight the
     view for Prince William County, and click Go to View.)
                                                             * sort by name
                                                             '" sort by map
                                                    Map List
                                    r resize map window to fit view
                                     Go to View
                                                                   Cancel
                                                                   Help...
3.   A number of different layers are shown,
    including the Places layer (showing
    various towns), the Water layer, and
    several CAMEO objects (which are all
    clustered in the northern part of the
    county).
    With the arrow tool, click several times on
    the map. As you select objects, they
    become highlighted with red dots, and
    MARPLOT displays their name at the
    bottom of the map window. Also, the
    location  of your click is marked with a
    flashing  icon called the Focus Point. The
    latitude/longitude coordinates of the
    Focus Point are shown in the upper-left
    corner of the map window.
    Note:  Your map window may not look
    exactly the same as the one shown here.
    The scale value shown at the top of the
    window  will probably be different.
  MARPLOT - Prince William County, VA
File Edit View List Objects Sharing  Help
T Focus Ft:  3B°40'45"H  77°19'35"W IT! in =  6.00 mi I T
                                             f Lake Ridge GDP (Places, Prince William County, VA) [city/place boundary]
                                             22

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                                                                 Chapter 2: Guided Tour
4.   From the View menu, select the Redraw item. For the sample map (and other standard MARPLOT
    maps), the map will redraw itself very quickly. However, for more complex maps (like LandView
    maps), the redraw function may take awhile to complete. The bottom of the map window shows
    each layer as MARPLOT draws it. If the map is taking a long time to draw, press the ESC (escape)
    key. To remind you that all of the layers to be drawn were not drawn, the bottom of the map window
    will show a message: [DRAW INCOMPLETE]. Even when the drawing is incomplete, however,
    you can still click on the map with the arrow tool to select any object that would have been drawn.
5.   From the List menu, select the Layer List item. This brings up MARPLOT'S list of layers. The
    layers can be sorted alphabetically or from top to bottom according to the order in which they are
    drawn. Currently the layers are sorted in draw order. Scroll up and down in the list of layers. Notice
    that the TIGER-derived layers (such as Places and Roads) are lower in the list than the CAMEO
    layers (such as Facilities and Hospitals). Since the layers are  shown according to the draw order, this
    means that the TIGER-derived objects will draw first (on the bottom), and then the CAMEO objects
    will draw after (on the top of the lower layers). As you click  on the names of different layers, notice
    that MARPLOT displays—in the bottom part of the window—the number of objects on that layer
    and also some graphical information about the layer.
6.   As can been seen in the columns in the center of the Layer List dialog box, all of the CAMEO layers
    are currently in Show mode, and all of the TIGER-derived layers  (Roads, Railroads, etc.) are
    currently in Range mode. When a layer is in Show mode, it displays no matter what  the map scale.
    When a layer is in Hide mode, it does not display. When a layer is in Range mode, it displays only
    within a certain range of map scales. For now, put all of the non-CAMEO layers except for the
    Places and Counties layers into Hide mode. To do this, click on each layer's line in the Hide column.
Layer List
' alphabetical
[• draw order
1 @
Showt
Names Show Range Hide
CAMEO Scenarios
1 fl 1 CAMEO Schools









^




a a
ifi
	 i 	 i

•s *•
1 \ -y \ \ 1 1 1 ^ •!
MMEO Transportation *
Roads (Major)
Roads
Railroads
ALOHA
Water
Miscellaneous
Places
CAMEO Schools
i S Objects: 1 on
: Move...








^







1 map
Scale Ranges...







^

S
S
S
S
S
S

Default graphics
Set...

| OK | Cancel | New... | l'i|ii,- | , '.; n--i!ii ...













Key








s
•s
•s
•s
•s
•s
•s
*/ T


,

Help...

                                           23

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                                                                     Chapter 2: Guided Tour
7.    Click OK. The map is redrawn with just the Places, Counties, and CAMEO layers shown.
                       ' MARPLOT Prince William County, VA
                      File Edit View  List  Objects  Sharing Help
[. llnllxl
                      •r Focus Pt: 38°47'26"N  77 °17' 04 "W I -r 1 in =  6.00 mi I -r
                      a
    Return to the Layer List dialog box using the Layer List menu item again. This time, set the Roads
    layer to Show mode by clicking in the Show column of the Roads layer's line.
Layer List
r alphabetical Show +
f draw order Names Show Ran9e Hide








i
R
S
Tempt-f^fiisfief
CAMEO Facilities
CAMEO Hospitals
CAMEO Incidents
CAMEO Scenarios
CAMEO Schools
CAMEO Transportation
Roads (Major)
Railroads










S
S
S
S
S
S











V






•S
S










Objects: 51 86 on 1 map
Move... Scale Ranges...

OK J Cancel New...
Default graphics
Set...

Rename...



ii











||

Key ?


y
	 i
^ *•
•s
•S
•S
•S
•S
•S
mm
•/ -r
71


Help...

                                              24

-------
                                                                    Chapter 2: Guided Tour
9.   Click OK. The map is redrawn with the Roads layer shown.
                        MARPLOT - Prince William County, VA
                      File Edit View List Objects Sharing  Help
                      T Focus Ft:  3Ei°47'26"N77 °17' 04 "W I -r 1 in = 6.00 mi I T
10.
The map view becomes cluttered with all of the roads at this zoomed-out view of the entire county.
It would be better to draw the roads only when you are zoomed in closer, so that there are not so
many objects shown at one time. This is just what the Range setting in the Layer List dialog box is
for. Return to the Layer List and set the Roads layer to Range mode. To see what range of scales the
roads will show in, highlight the Roads layer in the list and then click on the Scale Ranges button.
Layer List
C alphabetical Show +
C draw order Names Show Ran9e Hide








i
R
S
\ 	
L
Tenjpw&p Laves
ttMEO Facilities
CAMEO Hospitals
CAMEO Incidents
CAMEO Scenarios
CAMEO Schools
CAMEO Transportation
Roads (Major)
Railroads










^
^
^
^
^
^











V






^
^










Objects: 5186 on 1 map
Move... Scale Ranges... .

OK I Cancel New...
Default graphics
Set...

Rename...



ii
I










i|
	 i
^ *
^
^
^
^
^
^
^
•/ -r


if - I

Key ? | Help...


                                             25

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                                                                    Chapter 2: Guided Tour
11.
12.
The Layer Scale Ranges dialog box appears. You can modify four scale values: the most zoomed
out scale the layer will display at, the most zoomed in scale the layer will display at, the scale you
have to zoom in to before objects on the layer are displayed with their names, and the scale you have
to zoom out to before symbol objects on the layer are displayed as dots instead of icons.
Layer Scale Ranges
Layer: Roads
fi
(Eki
current scale: ^
1 in = 6.00 mi "
ti=-
[NTT
D=^
Move bar to specify scale at which name
•n labels for this layer appear.
J
i=!£)  Dots @ 1 in = 250.1 5 mi
1 ^ Show Layer @
=^j| s|| Show Names @
'— n <1 Hide Layer @
¥i | 	 , ,
lOKj Cancel
1 in = 2.03 mi
1 in = 0.05 mi
1 in = 0.01 mi
Key ? |

I
Help... |
Note that, in the case of the Roads, the layer is set to show when the scale is about 1 inch = 2 miles.
Our current scale is more zoomed out than that. If you keep these scale values, and leave the layer in
Range mode, you'll have to zoom in for the roads to appear.
Click OK to exit the Layer Scale Ranges
    dialog box, and then click OK to exit the
    Layer List dialog box. Notice that the
    roads are no longer displayed. Zoom in
    closer using the zoom-in tool.
    Click on this tool and then, with the
    magnifying glass, click in about the
    center of the county. This causes the view
    to zoom in by a factor of 2, centered on
    the point of your click. Note that the
    number of miles per inch has been cut in
    half.
                                              MARPLOT - Prince William County, VA
                                         File  Edit View List  Objects  Sharing Help

                                         •r Focus Pt: 38°45'28"N  77°31'59"W •'I in = 3.00 mi \ -r
                                             26

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                                                                    Chapter 2:  Guided Tour
13.  The roads still do not display because, as
    you saw in the Layer Scale Ranges dialog
    box, they are set to show only when you
    are zoomed in to at least 1 inch = 2 miles.
    Click one more time with the magnifying
    glass, again around the center of the map
    window. Now the roads appear because
    you have zoomed in past the threshold
    scale.
14.  Continue clicking with the zoom-in tool
    until you reach the scale at which the
    names of the roads appear. Note: If your
    Range Settings are still set to the default,
    this will be at 1 inch = 0.05 miles.
    For instance, the picture at right might be
    what you would see if you zoomed in by
    clicking on the red CAMEO hospital
    icon. If the names overlap one another,
    select the hand tool, and click and drag
    the map until the names no longer
    overlap.
  MARPLOT - Prince William County, VA
File Edit View List Objects Sharing Help
•r Focus Ft:  38°48'35"N 77°32'58"WTl in = 0.05 mi  T
                     D
               Central Hospital (DEMO)

                     Prince William County
                                             27

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                                                                     Chapter 2: Guided Tour
15.
You may have noticed that, as we were zooming in, the cities and towns disappeared. That is
because the Places layer, like the Roads layer, is currently in Range mode, and the Places are set to
turn off when we zoom in past a certain scale. To see this, return to the Layer List dialog box,
highlight the  Places layer and click on the Scale Ranges button.
                Layer Scale Ranges
                Layer: Places
                         current scale:   t
                         1 in = 0.05 mi   *
                                            Move bar to specify scale at which name
                                            labels for this layer appear.
                                              <] Icons-> Dots  @ 1 in = 150.60
                                             I <] Show Layer   @ 1 in = 33.91 m
                                        = =	H <1 Hide Layer   @ 1 in = 3.07 mi
                                                Show Names  @ 1 in = 0.75 mi
                                                                Key
                                                                     Help...
16.
Since it's true for most layers that you'll only want to see them within a certain range of scales, it is
common for most of the layers to be set to Range mode. However, there are some exceptions. For
instance, there may be relatively few objects on certain layers, such as the CAMEO layers. Since
these layers won't clutter the map display, you might want to leave them always in Show mode.
For now, set all of the layers except for the CAMEO layers back to Range mode. As you do so, you
may want to click on the Scale Ranges button to see the range setting for some of the other layers.
Then use the Go to View dialog box to return to the  view for Prince William County.
                                              28

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                                                                   Chapter 2: Guided Tour
Navigation and views
In the previous section, you saw two ways to navigate around the map: the Go to View dialog box, and the
plus magnifying glass tool. You may have guessed that the minus magnifying glass tool is used to zoom
out, also by a factor of 2. There are two other ways to change the view using the tools along the left edge of
the map window. To shift the map view without changing the scale, use the hand tool. The plus magnifying
glass tool I /-\?i can also be used to zoom into a particular rectangular area.


  1.   Select the plus magnifying glass tool now by clicking on it. With the entire Prince William County
      map in view, notice the two hospitals objects (red crosses) among the CAMEO objects. Let's zoom
      into an area just big enough to show both hospitals. Click with the magnifying glass above and to
      the left of the top hospital. With the mouse button still down, drag below and to the right of the
      bottom hospital. A gray box defines the region as you drag. When you have just surrounded both
      hospitals, release the mouse button. MARPLOT changes the view to show the area in the rectangle.
1. Click here and
hold with the
zoom-in tool.

Q;


                                MARPLOT - Prince William County, VA
-  n x
                              File Edit  View  List  Objects Sharing  Help
                                Focus Pt:  38 51'05 "N  7T23 ' 02 "W T 1 in=  6.00  mi
                                                              2. Drag to here
                                                                and release.
                                width = 7.37 mi,  height = 3.07 mi
Note: If you make a mistake using the magnifying tool, you can always return to the last view using the Go
to Previous View item in the View menu. Also, if you start defining the rectangle and then decide you don't
want to zoom after all, you can press the ESC key while the mouse is still down to cancel the zoom.
                                             29

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                                                                      Chapter 2:  Guided Tour
2.    The new map window now displays the selected area. Save this view for future reference. Select the
     Save Current View item from the View menu. The Save Current View dialog box appears. Name the
     view Two Hospitals and click OK.
                         MARPLOT - Prince William County, VA
                       File  Edit  View List Objects Sharing Help
                       T Focus Ft:  38°50'08"N  77 °36' 22 "V I T 1 in =  1.54 mi IT
3.    To show how the view is used, use the hand tool to shift the map view. To do this, click with the
     hand tool near the top of the view, drag down to the bottom of the window and then release the
     mouse button. This shifts the view to the north.
  1. Click here and
     hold with the
     hand tool.
                        MARPLOT - Prince William County, VA
                       File Edit  View List Objects Sharing Help
                      T Focus Ft: 38°50'08"N  77 °36' 22 "V I T 1 in = 1.54 mi IT
                                                                             2. Drag to here
                                                                                and release.
                                              30

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                                                                  Chapter 2: Guided Tour
4.   Now select the Go to View item in the View menu, highlight the Two Hospitals view, and click Go
    to View. You are returned to the saved view.
                                     resize map window to fit view
5.   Use the Go to View dialog box again to return to the  view of Prince William County.
    Save this view also, using Save Current View. Name it PWC Image.
6.   Another use for saved views is as a reference view. To see how reference views work, return to the
    Two Hospitals view again using Go to View. Then click on the triangle in the upper-right corner of
    the map window, go to the Reference View submenu, and choose Set. Select the PWC Image view,
    leave the "allow any view in reference" box unchecked,  and click Set Reference View.
                MARPLOT - Prince William County, VA
              T Focus Ft:  38 50'3B"N  77 36'08"W T! in= 1.54 mi  -r
                                            31

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                                                                    Chapter 2: Guided Tour
7.   The reference view, showing the PWC Image, appears in the upper-right corner of the map window.
    The reference view shows the location of the current view in the map window relative to some other
    view. In this case, you see the area of the Two Hospitals view relative to the entire area of Prince
    William County. The flashing red box indicates the shown area.
               I File Edit View  List  Objects Sharing Help
               T Focus Ft: 3B °5LV 21"N  11 °3 &' 13 "W T 1 in = 1. 54 mi \ -r Ref : PWC Image,
    Use the hand and magnifying glass tools to move all around the map. Notice how the flashing
    rectangle in the reference view follows you. Zoom in until the road names appear. Notice that, when
    the flashing rectangle gets too small, it is replaced by a red crosshairs, pinpointing your location.
    You can double-click at a point on the reference view to view that area. Try double-clicking a few
    times on the reference view. Also, by clicking once and dragging on the reference view rectangle,
    you can reposition it in the map window.
                    PLOT - Prince William County, VA
               File Edit View  List  Objects Sharing Help
               T Focus Ft: 38°48'23"N  77 °37' 4 9 "V \ T 1 in = 0.03 mi | T Ref: PWC Image,
                                             32

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                                                                     Chapter 2: Guided Tour
9.    Let's try one more experiment with the reference view. Return to the Two Hospitals view using Go
    to View.
                       Find:  |
. Prince William County, VA
PWC Image, Prince William County, VA

include shared views
                                                               '•* sort by name
                                                               '•  sort by map
                                                     Map List
                                      Go to View
                                     F resize map window to fit view
                                                                    Cancel
                                                                    Help...
10.  Click once with the plus magnifying glass in the center of the map window. Now set the reference
     view again, this time choose the Two Hospitals view as the reference view (again, leave the "allow
     any view in reference" box unchecked). As you saw before when using PWC Image as the reference
     view, here the Two Hospitals view is serving as a reference view and the flashing rectangle shows
     the area of the current map window relative to it.
                File  Edit  View List objects Sharing  Help
                T Focus Ft: 38 50'4£"H  77 3£'27 "W  T 1  in = 0 . 77 mi  T Ref: TWO Ho spit
                                              33

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                                                                 Chapter 2:  Guided Tour
11.
This time, however, notice what happens when you use the minus magnifying glass to zoom out two
times. As soon as the view in the map window no longer fits within the Two Hospitals reference,
MARPLOT automatically changes the reference view to the PWC Image. If you then zoom back
into an area within the Two Hospitals view, MARPLOT automatically changes the reference view
back to the Two Hospitals view. These automatic changes happen because we had the "allow any
view in reference" box unchecked when we set the reference view. When this box is checked,
MARPLOT allows a view to stay in the reference view,  even when the current map view does not
fall completely inside of it.
               File Edit View List Objects  Sharing Help
              T Focus Ft:  38 °53'40"N  77 °44'28 "W  T 1 in = 3 . 07 mi  T Ref:  pure Image
12.  When you have saved a view and are sure you no longer want to work with it, you can delete it
    using the Edit Views item in the View menu. Select Edit Views now and delete both the Two
    Hospitals view and the PWC Image view. Click OK. Notice that the reference view is closed
    automatically because you deleted the view it was using.
                                           34

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                                                                          Chapter 2: Guided Tour
Searching for cities and roads
One of the most common operations you will perform in MARPLOT is searching for an object, often for
an address range or intersection of a certain road. Another common search, if you are working in a large
county, is to find a certain city or town within the county.
  1.    Let's search for a town within Prince
       William County. Bring up the
       Search Criteria dialog box by
       selecting Search from the List menu.
  2.
  3.
                                      Search Criteria
                                       Search for objects that:
Click on the pop-up box below
"Search for objects that:" and select
"have any name." After "Layer(s) to
search:" choose "Individual Layer..."
in the first pop-up box and "Places"
in the second pop-up box. After
"Map(s) to search:" choose "Maps in
View" and leave the final pop-up
box set to "replace previous
collection." Then click the Search
button.
                                        jhave any name
                                              Layer(s) to search:
             Map(s] to search:
                                              Individual Layer...
              Maps in View
                                              Places
                                              I  Search[J
             replace previous collection
MARPLOT performs the search, and puts all of the objects that match the specified criteria into the
Search Collection. In this case, you found all of the objects on the Places layer of the Prince William
County map. The Places layer contains one polygon object representing each city or town in the
county (some of which are Census Designated Places).
                    Search Collection
                     Number of objects in collection:  18

                       Object Name               Layer
                                                       Place/Map
                     S. Gainesville CDP
                     CL Haymarket town
                     CL Lake Ridge CDP
                     CL Linton Hall CDP
                     CL Loch Lomond CDP
                     CL MontclairCDP
                     CL Nokesville CDP
                     CL Occoquan town
                     CL Quantico Station CDP

                     P make all other objects

                      Save Collection...

                      Load Collection...
                                         Places
                                         Places
                                         Places
                                         Places
                                         Places
                                         Places
                                         Places
                                         Places
                                         Places
Prince William County, VA
Prince William County, VA
Prince William County, VA
Prince William County, VA
Prince William County, VA
Prince William County, VA
Prince William County, VA
Prince William County, VA
Prince William County, VA
                                on these layers invisible
                                  Intersections        Show All on Map
                                         Addresses       Show on Map & Zoom K

                                                          Show on Map
                                                                      Help...
                                                                      Close
                                                  35

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                                                                       Chapter 2: Guided Tour
4.    Find Dumfries town in the list and click on its name to highlight it. Click the Show on Map & Zoom
     button. This causes MARPLOT to change the view so that Dumfries town just fits into the map
     window.
                  MARPLOT - Prince William County, VA
                File Edit View  List Objects Sharing Help
                   cus Ft:  38°33'53"N  77°19'04"W
                T Dumfries town (Places, Prince William County, VA) [city/place boundary]
5.    Go to the Layer List and set the Places layer back to Range mode. Note: MARPLOT automatically
     changed the Places layer from Range to Show mode because you asked to zoom into an object on
     the Places layer that would not be shown in Range mode at the chosen scale.
                 C alphabetical
                 f draw order
                 Places
                  !i Objects: 18 on 1 map

                    Move...
Show +
Names Show  Ran9e  Hide









CAMEO Transportation
Roads (Major)
Roads
Railroads
ALOHA
Water
Miscellaneous
Shoreline
Counties









^









S
S
S
S
S
-S

•/



























•S *
•S
•s
•s
•s
•s
mm

•/ -r
                                          Scale Ranges...
           Default graphics:
                  Set... I
                                     New...!   Delete                 Key  ?J  Help... |
                                               36

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                                                                    Chapter 2:  Guided Tour
6.   Now we see the same area without the Places polygons cluttering the view. There is a street in
    Dumfries town named Cameron Street. Use the Search function to find this street. In the Search
    Criteria dialog box, search for objects that "have names that start with." Type the letters "cam" in the
    box that appears in the upper-right. Search on the "Individual Layer" named "Roads." Again, search
    on "Maps in View" and choose "replace previous collection." Click Search.
                   Search Criteria
                    Search for objects that:
                      have names that start with...
                    Layer(s) to search:
Map(s] to search:
                     Individual Layer...
                                                Maps in view
                     Roads
                    |	Search	J
replace previous collection
7.   Again, the Search Collection dialog box comes up with the results of the search. Highlight
    "Cameron St" and click Show on Map. Note: If you had used Show on Map & Zoom, MARPLOT
    would have changed the view to show just the area covered by Cameron Street in the map window,
    but this time you don't want to change the viewing scale.
Number of objects in collection: 10
Object Name Layer
/v Camborne Q
/v Cambridge Dr
/v Camellia Ln
/v CamelotD
/v CamfieldCt
/v Campaign Q
/v Campbell D
/v Campbell Ln
/v Camus Mews
P make all other obj
Save Collection...
Load Collection...
Roads
Roads
Roads
Roads
Roads
Roads
Roads
Roads
Roads
sets on these layers inv
Intersections
Addresses

Place/Map
Linton Hall CDP J
Lake Ridge CDP
Montclair CDP
Montclair CDP
Bull Run CDP
Bull Run CDP
Sudley CDP
Dale City CDP
Dale City CDP
sible
Show All on Map
Show on Map & Zoom Help...
Show on Map Close
K<
                                             37

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                                                                         Chapter 2:  Guided Tour
     MARPLOT highlights "Cameron St" on the map with red dots and shows its name at the bottom of
     the map window. It also puts the Focus Point at the center of the street.
                    "RPLOT - Prince William County, VA
                 • Focus Pt:  38 °34'06"N  77 °19'44"W  T! in =0.56 mi
000
9.    Use the plus magnifying glass tool to zoom into an area that shows just Cameron Street, plus a little
     extra space for borders.
                    •RPLOT - Prince William County, VA
                 File  Edit  View List Objects  Sharing  Help
                 T Focus Ft:  38°34'06"N  77°19'49"W  T 1 in = 0.07  mi
                 T Cameron St (Roads, Prince William County, VA) [undivided neighborhood road]
                                                38

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                                                                   Chapter 2: Guided Tour
10.  Suppose you want to know where the address 150 Cameron Street can be found. Go back to the
    Search Collection using the Show Search Collection item in the List menu. With "Cameron St"
    highlighted, click on the Addresses button.
Search Collection
Number of objects in collection: 10
Object Name Layer Place/Map
xv Camborne Q
xv Cambridge Dr
xv Camellia Ln
xv CamelotCt
xv CamfieldCt
xv Campaign Q
xv Campbell Q
xv Campbell Ln
xv Camus Mews
l~~ make all other objects or
Save Collection...
Load Collection...

Roads Linton Hall CDP ^J
Roads Lake Ridge CDP
Roads Montclair CDP
Roads Montclair CDP
Roads Bull Run CDP
Roads Bull Run CDP
Roads SudleyCDP
Roads Dale City CDP
Roads Dale City CDP
these layers invisible
Intersections Show All on Map
Addresses K. Show on Map & Zoom Help...
k
Show on Map Close

11.  MARPLOT displays the list of address ranges for Cameron Street. You are looking for address 150,
    which falls within the range 100-199. Highlight this range in the list and click Show on Map.
                     Addresses for object:  Cameron St
                             on layer:  Roads
                              of map:  Prince William County, VA
                                         200 - 299
                                         212 - 399
                                         400 - 499
                                Show on Map  I   Show on Map & Zoom
j    Help...

     Cancel
12.  MARPLOT shows the location of the address range by positioning the Focus Point at the center of
    the segment that corresponds to the selected range.
13.  Now find the intersection of Cameron Street and West Duke Street. Again, bring up the Search
    Collection using the Show Search Collection item in the List menu. With "Cameron St" highlighted,
    click on the Intersections button.
                                            39

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                                                                    Chapter 2: Guided Tour
  14.  MARPLOT lists all of the streets with which Cameron Street intersects. Highlight "W Duke St" in
      the list and click Show on Map. Note: Show on Map & Zoom would change the scale to an
      appropriate scale for viewing the intersection, but in this case you are already at such a scale.
Intersections
Intersections for object: Cameron St
on layer: Roads

of map: Prince William County, VA
l~~ Intersect with all layers
Number of intersections found: 6
Object Name
King St
MineRd
Prince St
Washington St
^3s/wjgfafj SH'WDtike St}
untitled

{ plus 1 alias }
Layer Place/Map
Roads Dumfries town
Roads Dumfries town
Roads Dumfries town
Roads Dumfries town
Roads Dumfries town
Roads Dumfries town
Show on Map. 1 Show on Map & Zoom Cancel Help...
H 	 	
  15.  MARPLOT selects both Cameron Street and West Duke Street, and puts the Focus Point at their
      intersection.
                   MARPLOT - Prince William County, VA
                 File  Edit  View List  Objects Sharing Help
                 T Focus Pt: 38°34'07"N  77°19'45"W  T 1 in =0.07 mi  -r
                 I
This concludes the MARPLOT guided tour. If other people will be taking this tour using this MARPLOT
system, please use the Go to View dialog box now to return to the  view for Prince William
County. Then exit from MARPLOT. You can find more MARPLOT examples in Chapter 4.
                                              40

-------
                                    Reference
             Refer to this chapter for detailed explanations of MARPLOT program operations,
             features, and menu items.
MARPLOT display window
The MARPLOT window contains many components. The title of the window displays the name of the
map currently shown in the window, or simply "MARPLOT" if more than one map is shown.
           ' MARPLOT - Prince William County, VA
- n x
          File  Edit View List Objects Sharing Help
          T Focus Pt:  38°48'24"W  77°47'llrpW  T 1:362040 T
                                                          :  PWC 
               12/03/06
               1:29 PM
               Prepared by NQM/Hazmat
0 5
0 10
1 in = 5.714 mi
10 mi
20km
1 cm =3.620 km
Below the title is a line containing three pieces of information:

  1.   Latitude/longitude coordinates of the Focus Point. The Focus Point is the flashing target-shaped'w'
      icon that marks the location of the most recent point of interest. You can change the format of the
      latitude/longitude values using the Preferences item in the File menu.
  2.   Current map scale. The scale can be displayed in one of three different formats, as chosen using the
      Preferences item in the File menu.

  3.   Name of the reference view, if a one is currently being shown (see "Reference View" on page 57).
                                         41

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                                                                      Chapter 3: Reference
The various tools are along the left side of the map window. The currently selected tool is shown
highlighted. The function of each tool is described later in this chapter (see "Tools" on page 78). When you
have unlocked one or more layers (see "Layer List" on page 66), additional tools for creating new objects
appear.

Along the bottom of the map window is a status line that is used to display various messages. Among other
things, it gives the name, layer, map, and Census classification of the most recently selected object. If you
pressed ESC to cancel a time-consuming map draw (see "Redraw" on page 59) this bottom  line will
display the words DRAW INCOMPLETE to remind you that you are looking at an incomplete picture.

When you select objects on the map (usually by clicking them with the arrow tool) MARPLOT indicates
that they are selected by drawing small, red squares along their borders.

Finally, if you are using the Marked Point (see "Marked Point" on page 58), it appears as a pink, target-
shaped icon  A..
             Y

Remember that what you see in the map window depends upon (a) the area you are looking at, (b) the
current scale (remember that layers can be set to show only at certain scales), (c) the order of the  layers
(layers can draw over one another), and (d) the maps that are currently in use. If you are not seeing  what
you expect, consider each of these factors.


Pop-up menus on the map window
The status lines at the top and bottom of the map window show small black triangles indicating that you
can click in the given area to activate a menu that lets you perform functions  related to the item displayed.
For instance, clicking in the Focus Pt area brings up a menu of functions related to the focus point, while
clicking on the map scale area brings up a menu of functions related to map scale. The function of each of
these pop-up menu items is explained below.

Clicking in the Focus Pt area at the top of the map window brings up the a Focus Point menu.
   •   Copy Coordinates copies the displayed focus point         	
      coordinates to the clipboard.                              -*• Focus  Pt:
      Coordinate Format brings up the Preferences dialog box      Copy Coordinates
      so that you can change the format in which coordinates are      Coordinate Format,.,
      displayed.
                                                               Center on Focus Point      Ctrl+T
      The remaining items in this menu perform the same            Mark Focus Point
      function as the identically named items in MARPLOT'S        GO to Lat/Long,,,          Ctrl+A
      View, Marked Point, and Vertex menus.
                                                               Mark Vertex
                                                               Move Vertex to Marked Point
                                                               Insert Vertex at Focus Point  Ctrl+H
                                                               Delete Vertex            Ctrl+J
                                              42

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                                                                      Chapter 3: Reference
Clicking in the map scale area at the top of the map window brings up a scale menu.
   •   Copy Scale copies the displayed map scale to the clipboard.         i T -^
   •   Scale Format brings up the Preferences dialog box so that you can       copy Scale
      change the format in which the map scale is displayed.
                                                                       Scale Format...
   •   Zoom In and Zoom Out change the map scale by a factor of two,
      centered at the Focus Point (note that Zoom In and Zoom Out are        Zoom In       ctrl++
      not included in the View menu).                                     Zoom Out      Ctrl+'
   •   Set Scale performs the same function as the identically named item        e  ca e " '      t+>
      in the View menu.

Clicking in the reference view name area at the top of the map window (the rectangle just to the right of the
map scale area) brings up a view menu.
   •   Copy Name copies the displayed reference view name to the clipboard      I ^ Ref .
      (if a reference view is currently shown).
                                                                             Copy Name
   •   Reference View allows you to show or hide the reference view, and
      .      .   .      ,      ,       .,        .                                 Reference View  t
      choose the view to be used as a reference  view.
                                                                             Legend        >
   •   Legend allows you to show or hide the legend, and set legend options.         Scale Bar      >
   •   Scale Bar allows you to show or hide the scale bar, and set scale bar            Ime  "amp
      options.
   •   Time Stamp allows you to show or hide the time stamp, and set time stamp options.

Clicking in the message area at the bottom of the map window brings up an object menu.
   •   Object Settings and Segment Settings perform the
      same function as the identically named items in the             object Settings' • •       Qrl+B
      Objects menu.                                              Segment Settings' ' '     ctrl+E
   •   Copy Object Record copies to the clipboard the MIE          Copy Object Record
      (MARPLOT Import/Export)  record for the selected             Copy Ob'ect Coordinates
      object.                                                     Copy Text

   •   Copy Object Coordinates copies to the clipboard the list of latitude/longitude coordinates for the
      selected object.
   •   Copy Text copies whatever text is in the message area to the clipboard.


Map insets
The reference view is just one of four insets that you can display in the map window. Each of the four
insets is discussed in this section. Note: When you print or save the contents on the map window, any
displayed insets are included in the output.
                                              43

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                                                                      Chapter 3:  Reference
You can show and hide the various insets, and set a number of options related to their display, using the
Preferences dialog box (see "File menu" on page 45) and the pop-up menu in the reference view name area
of the map window. To position any of the insets, click on them with the mouse and drag to the desired
location. MARPLOT remembers this as the position of the inset until you move it again.
Reference view.  The reference view shows the location of the current
view in the map window relative to some other view. The flashing red box
indicates the shown area. When you zoom in past a certain point, the
flashing box is replaced by a red crosshairs, pinpointing your location.
Double-click anywhere on the reference view to center the map view on
that location.
Legend.  The legend displays a map key in one of two formats.
The simplest option is to have MARPLOT generate a legend from
the list of layers you selected in the Preference dialog box.
Alternately, you can create a bitmap in another program and have
MARPLOT use it for the legend. Double-click the legend to bring
up the Preferences dialog box where you can set options for the
display of the legend.
Legend
Railroads

Roads (Major)

Water
Scale bar.  The scale bar inset shows the current map scale in a number of available formats including a
number line marked with English units, a number line marked with metric units, an equation with
"1 in = ...", and an equation with "1 cm = ...". Double-click the scale bar to bring up the Preferences dialog
box where you can set options for the display of the scale bar.
0 5
1 1
0 10
1 in = 5.714 mi
10 mi
i
20km
1 cm =3.620 km
Note: You may notice that MARPLOT'S interpretation of a screen inch will not agree with a ruler laid
against your computer monitor. The discrepancy will depend upon your computer system and monitor
settings and you may not notice it unless you actually measure it. Rest assured that the scales on maps
printed from MARPLOT will be accurate and will agree with a ruler laid against the printouts.
Time Stamp. The time stamp displays the current date and time in any of
a number of available formats. You can also include a one-line comment in
the time stamp. Double-click the time stamp to bring up the Preferences
dialog box where you can choose date and time formats, and enter the one-
line comment.
      12/03^06
      1:29 PM
      Prepared by NQAA/Hazmat
                                             44

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                                                                       Chapter 3:  Reference
File  menu

The items in the File menu allow you to perform a variety of input/     i ,,s  i
                                                                 i J"H.,f?'	I
output functions, and to accomplish miscellaneous system-level        L
.   ,                                                                 Save as Picture,,,
tasks.
                                                                    Print 5etup,,,
Note that there is no Save item in the File menu. When you make          Print,.,          Ctrl+P
changes to objects on maps, the changes are immediately written to
disk. This means that there is no need for you to explicitly save any
changes you make. The price of this convenience, however, is that          xp°r
you need to be that much more careful to keep backup copies of           Compact Map Files
any maps you will be editing, so that you can revert to a saved
version if you make invalid changes (see "Keeping backups" on
     , ._                                                            Administrator...
page 147).
                                                                    Exit

Save as  Picture
The Save as Picture menu item is used to save an image of what is currently drawn in the map window to a
picture file. Such a file can be opened with a standard drawing program. The procedure for saving a picture
differs slightly between Windows and Macintosh.

Save as Picture in Windows. When you choose Save as Picture, you are presented with a standard
file-saving dialog box to specify the file to be saved. You can choose to save a bitmap (.bmp) file or a
metafile (.wmf). Metafiles are often smaller than bitmap files, and have the advantage that certain
programs will allow you to edit them on an object-by-object basis. However, bitmap files are more
common and can be opened with standard drawing programs.

A check box, which only applies when you are saving as a metafile, gives you the option of saving into the
picture only the currently selected objects. This is useful if you want to save into the picture a less cluttered
view of a certain set of objects.

Save as Picture on  a Macintosh. When you choose Save as Picture, you are presented with a dialog
box that lets you specify the size of the picture to be saved. By default, the saved picture is the same size as
the screen display. If you want to expand or shrink the image when saving, you can specify the desired size
either by giving its dimensions (width and height),  or by specifying the map scale that you want the picture
to have.

A check box gives you the option of saving into the picture only the currently selected objects. This is
useful if you want to save into the picture a less cluttered view of a certain set of objects.

When you click OK to confirm the size, you are presented with a standard file-saving dialog box to specify
the file to be saved.
                                              45

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                                                                     Chapter 3: Reference
Print
The Print menu item is used to print what is currently drawn in the map window to your printer. When you
choose the Print item, you are presented with a dialog box that lets you specify the size of the printed
output. By default, the output will be fit to the printed page. If you want to specify the image dimensions,
you can enter either the desired width and height or the map scale that you want the output to have. If you
specify the image dimensions, the Print dialog box displays the size of a printed page as well as the number
of pages that will be printed.

A check box gives you the option of printing only the currently selected objects. This is useful if you want
to print a less cluttered view of a certain set of objects.


Import

WARNING: Use this menu item with caution. Incorrect use can result in lost data. It is safest to back up
your map files before importing (see "Keeping backups" on page 147). Importing data will change the
objects on a layer—even if the layer in question is currently locked. The Import menu item is only
available to users who have edit-level permission. If your MARPLOT system uses map files shared over a
network file server, make sure that no other users are currently using the shared map files before you use
Import.

The Import menu item is used to read in a list of objects from  a text file. As explained in "Object
identification" on page 16, MARPLOT objects are identified by an ID number, layer name, and map name.
The most common use of the Import feature is to share data with another MARPLOT system, which may
result in situations where MARPLOT has to resolve conflicts between objects with the same ID number,
layer name, and map name.

The Options button in the Import dialog box allows you to specify what MARPLOT should do in the case
of ID conflicts during import. The default behavior is to overwrite the existing object with the information
in the import file. Alternatively, you can choose to keep just the  old object, or to both keep the old object
and import the new object. (In the latter case, you will have multiple objects with the same ID number on
the given layer.)

MARPLOT'S default import behavior is designed for sharing and updating data from a source MARPLOT
system to your MARPLOT system. A user of that system can  export certain objects to a MARPLOT
Import/Export (MIE) file. You can then import that MIE file in your system. Any new objects (i.e., objects
that were created in the other system but don't yet exist in your system) will be added to your system. By
default, any objects that match existing objects in your system (i.e., that have the same ID number, layer
name, and map name) will replace those existing objects. The net effect is that your system will be updated
to match the objects in the other system. Keep in mind, however, that if you import bad data, you may lose
important data that you have entered in your system.
                                             46

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                                                                   Chapter 3: Reference
The import file can be in one of four different formats:

   •  MARPLOT Import/Export (MIE) format: Standard format for exchanging MARPLOT
     information. These files contain complete MARPLOT information about each object.

   •  MARPLOT Simple Point format: In this format, the objects appear one-per-line. Each object is
     specified as a single point. Besides the coordinates, the following attributes may be included: name,
     layer, map, symbol, color, and ID.

   •  Arclnfo™ GENERATE format: Allows MARPLOT to exchange data with Arclnfo. Besides the
     coordinates, the following attributes may be included: name, layer, map, symbol, color, and ID.
   •  MARPLOT 1.0.1 (for Macintosh) export format: Used only to bring objects from MARPLOT
     1.0.1 into the current version of MARPLOT.

See the MARPLOT Technical Documentation for more information about import/export formats.


Export
The Export menu item is used to write a list of objects to a text file. The objects to be written can be either
those objects currently selected on the map, or those objects currently in the Search Collection. You can
export in one of three formats:

   •  MIE format,
   •  MARPLOT Simple Point format, or
   •  Arclnfo GENERATE format.

In the case of the latter two formats, you can output the coordinates along with any subset of the following
attributes: name, layer, map, symbol, color, or ID.

See the MARPLOT Technical Documentation for more information about import/export formats.


Compact  Map Files
Note: If your MARPLOT system uses map files shared over a network file server, make sure that no other
users are currently using the shared map files before you use Compact Map Files.

The Compact Map Files menu  item, which is mostly for use by MARPLOT system administrators,
performs a number of optimizations on your maps to make them draw more quickly and use less disk
space. You will only need to use Compact Map Files after importing or after making a large number of
changes to your maps. There is no harm in using Compact Map Files at other times, but you should not
expect any improvement in efficiency.

Compacting your map files can take  less than a minute if your maps are small and/or are already mostly
compacted. However, for large, uncompacted map files, the process can take longer (although you can stop
the process at any point if it is taking too long).
                                            47

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                                                                     Chapter 3: Reference
Before choosing the Compact Map Files function, you should make sure you have sufficient free disk
space. A rule of thumb is to make sure you have free on each disk containing a map folder at least twice the
space of the single largest object (.OBJ) layer file on that disk. If MARPLOT is unable to complete the
compaction process because of low disk space, it will tell you.

Compact Map Files performs two main functions to improve map file efficiency:
  1.   Removes the space  occupied by deleted objects from the map files, and
  2.   Sorts the objects in  each map file geographically, for improved speed during drawing.

Compact Map Files also does some other cleanup work on your map files. If you think your map files have
been corrupted somehow, you might try compacting them to fix the problems.

When you use Compact Map Files, even those files belonging to locked layers are checked and compacted.
However, files belonging to maps that are not currently in use will not be touched (use the Map List menu
item to see which, if any, of your maps are not in use).


Preferences
Because of the large number of preferences that you can set in MARPLOT, the Preferences dialog box is
broken up into six tabbed panels. Move between the panels by clicking the tabs at the top of the window.

The Colors panel lets you  set the background color for the map window. The Tools panel lets you set
preferences for various tools. (These choices are also available by double-clicking the tool icons on the left
edge of the map window.)
Preferences

Colors
T . Latit
Tools Lon
Arrow Tool Selection
>'• rectangle (from corner]
f" circle (from center)
Zoom Tool Selection
(• from
r from

OK j
corner
center
Cancel HE

ude 1 c ,
jitude Scale
Legend
Date 1 Time
Rectangle Tool
f* draws from corner
(~ draws from center
Circle Tool
<~ draws from corner
!• draws from center
Ip...



                                             48

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                                                                            Chapter 3:  Reference
The Latitude/Longitude panel lets you choose the format in which coordinates are displayed, and control
the lat/long grid in the map window. You can choose whether lat/long values are displayed as degrees with
a six-place decimal (e.g., 40.250000°), as degrees followed by minutes (e.g., 40°25.10'), or as atriplet of
degrees, minutes, and seconds (e.g., 40°25'00"). Notice that you can display the grid above or below the
map, and you have the option of including unlabeled intermediate lines when a dense grid is desired.
                 Preferences
                      Colors
                                Tools
           Latitude /
           Longitude
                                                     Scale
                                                              Legend
                                                                       Date i Time
                     Coordinate Format
                      i*" degrees
                      r degrees/minutes
                      ''• degrees/minutes/seconds
                    Iv show lat/long grid
                     I* show intermediate lines
                     Position:  c* above layers
                              f~ below layers
                     OK
Cancel
Help...
The Scale panel lets you choose the scale format for the map window display and the scale bar inset. The
scale can be a ratio (e.g., 1:50000), in units (e.g., 1 in = 10 mi), or as window dimensions (e.g., 5x3 mi).
                 Preferences
                      Colors       Tools      Longitude     Scale      Le9end    Date ^ Time
                       Scale Format
                        r 1  :N
                        f 1  in = N mi
                        r window distance
                      Units: miles
                    Iv show scale bar

                     P show English number line
                     P show metric number line
                     W show"1 in = ..."
                     I? show "1cm = ..."
                     OK
Cancel
Help...
                                                 49

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                                                                     Chapter 3: Reference
The Legend panel lets you choose which type of legend to display: a picture or a list of the shown layers.
For a picture legend, you can choose any bitmap or PICT picture from your computer using the Set button.
For a layers legend, you can choose which layers are shown.
Preferences


Colors


Tools


Latitude /
Longitude
Scale

Legend



Date / Time

Iv show legend
<~ legenc
Set...




-'.•.•'-•.•'-•.-'-•.-'.•.-'.
-•.-.•.-.•.•-•.•-•.--•
•'-'.•'-•.•"-•.•"•'.•"•'.•'-
•.•'••.•'••.•'••.•'••.•'••.•
•.•••.•••.•••.•••.••v
.-.-...-...•...•.-.-.-


OK

from picture
• legend from layers
(3 layers checked] F


















"•'.•'-'.•'-•.-"-•.•"••.•"•'.•'-•.•"-•.•"
.•'••.•'••.•'••.•'••.•'••.•'••.•'••.•'••.
..-...•...•.-.-.-.-...-...•...•.-
•••.•••.• ••.•••.•••.•••.•••.•••.•

Cancel

















all shown layers
Places
•S Railroads
•S Roads (Major)
Shoreline
Temporary Layer
*/ Water

Help...





-








The Date/Time panel lets you choose formats in which the date and time are displayed in the time stamp
inset. The one-line comment you enter here is included in the time stamp.
Colors
W show di
Date
w 12/03/
(~ Decen
("' custon
<~ none
Comment:

OK
Tools Longitude Scale Le9end Dale / Time
ite/time stamp
Time
06 
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                                                                     Chapter 3: Reference
Administrator
See Chapter 6 for more information about MARPLOT administration.

The first time this menu item is used, it puts MARPLOT into multi-user mode (as opposed to single-user
mode). In multi-user mode, one person (usually the one who first uses the Administrator menu item) is the
system administrator. The administrator has the ability to add other users to the system, giving them
passwords and user codes.

After the first use of the Administrator menu item, the item is only available to the MARPLOT system
administrator. It brings up a dialog box in which the administrator can add new users and modify user
settings. For each user, the administrator can set the user's name, password, and permission level (edit or
browse). Each user is also assigned a four-character code that is attached to each object the user creates
and/or modifies. Using the Object Settings dialog box for a given object, you can see the code of the
creator and last modifier of the object.

Note that the administrator can change his or her own password. The administrator should do this as soon
as the Administrator menu item is chosen for the first time.

Once MARPLOT is in multi-user mode, it is possible to return to single-user mode. The administrator does
this using the Stop Administration button in the MARPLOT Administrator dialog box. This renames the
USERS folder as USERSX. If the Administrator menu item is chosen again, USERSX is renamed USERS,
and the previously established administration is reinstated.
Edit menu                                             j&
                                                                 Undo              Ctrl+Z
The Cut, Copy, and Paste items in the Edit menu are not used to cut,
copy, and paste MARPLOT objects. While you cannot use the Edit
menu to perform these functions, MARPLOT provides a number of
mechanisms to accomplish the desired goals. To move objects,
select one or more and drag them with the arrow tool. To change an
object's layer or map, use the Object Settings dialog box. To change      Insert Picture Object...
several objects at once, use the Move items in the Objects menu.
                                                                 Make New Polygon...
                                                                 Make New Polyline
Undo                                                          Polyline <-> Polygon

You can undo the last change you made to the objects on the map. For instance, if you accidentally delete
an object, you can use Undo to get it back. Similarly, if you accidentally move an object, you can return it
to its original position. Some complex operations, such as importing a group of objects, cannot be undone.


Cut, Copy, and Paste
Cut, Copy, and Paste have no function in MARPLOT. They cannot be used to place MARPLOT objects on
the clipboard or paste objects from the clipboard into MARPLOT.
                                             51

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                                                                       Chapter 3: Reference
Clear
Clear deletes the currently selected map objects. You can get the objects back immediately after the clear
using Undo.


Insert Picture Object
The Insert Picture Object menu item is used to create a new picture object.

A picture object is like a rectangle object that is filled with an image, instead of with a standard pattern.
Picture objects are like other objects in that they can be named, moved, deleted, etc. You can have as many
picture objects as you want, on any layers.

The most common use for a picture objects is as a base map onto which you place other map objects. The
idea is to place a picture object, which covers a fairly large geographical area, onto a layer that is near or at
the bottom of the layer list. You can then place other objects, such as icons representing facilities, on other
layers that are on top of the picture object's layer. While the picture object is technically an object just like
those that are placed on top of it, by leaving the picture on a low layer, and by leaving that layer locked,
you can achieve the effect of having the picture represent the background (or base map).

However, picture objects may also be used as small objects in their own right. For instance, you might have
a logo or other design that you want to place directly on your map. You can do so using a picture object.

Inserting the  picture Object.  When you choose the Insert Picture Object menu item, MARPLOT asks
if you want the picture object you are about to add to be the first object on anew map (i.e., the base map for
the new map) or an object on an already-existing map. If you choose to make a new map, the name of the
map will be the same as the name of the picture file you select.

The image for the picture object can come from either a picture file (i.e., a file—usually made by a drawing
program—that contains a picture) or from the clipboard (when you have just copied a picture to the
clipboard using the Copy menu item in some other program). If you have  copied a picture from another
application before choosing the Insert Picture Object menu item, MARPLOT asks if you would like to use
that picture, or choose another from a picture file. However, when you are creating a new map, the image
must come from a picture file, not the clipboard.

If you choose to insert a picture from a picture file, MARPLOT then lets you locate the picture file on the
computer.  MARPLOT reads the picture (either from the clipboard or the file) and creates a new picture
object. It then brings up the Object Settings dialog box for the new picture object, to allow you to change
any of its settings. As with other objects, you should be careful to make sure the picture has been placed on
the correct layer and map.
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                         Chapter 3: Reference
        A note to Macintosh users
        Some picture files, such as those output by
        previous versions of MARPLOT, already
        have lat/long information about the picture
        they contain stored in a resource. When you
        insert one of these picture files, MARPLOT
        will automatically use the provided lat/long
        values, and no geo-referencing is
        necessary—unless you want to place the
        picture object in a different location.
Geo-referencing the picture object.  Especially
important at the time you create a picture object is the
Geo-Reference button in the Object Settings dialog box.
The point of the Geo-Reference button is to let you
specify exactly where on the earth the new picture object
belongs. In some cases, such as when you are using
picture objects as small objects instead of as base maps,
you will probably not need to geo-reference your picture
objects at all; it will be sufficient to drag and stretch
them like other objects. But for large base map picture
objects that are supposed to represent a precise area, you
will usually want to geo-reference them to indicate
exactly where they go.

If you do not geo-reference the new picture object as it is being created, it will be placed initially so that it
is centered about the Focus Point and scaled to its standard size. No harm is done, since you can always
geo-reference the object at a later time. For more about geo-referencing, see "Geo-referencing a picture
object" on page 75.

Finishing up. From the Object Settings dialog box, click OK when you are happy with the settings for
the new picture object, or Cancel if you decide not to create the object after all. When you click OK,
MARPLOT creates a file within the folder of the picture object's map to keep a copy of the picture.


Make New Polygon
This menu item performs different functions depending on which objects are currently selected.

If a single polyline object is selected, it creates a new polygon object that forms an "envelope" around the
selected polyline. An envelope is a complex polygon object that is constructed to cover the map area
within a given distance from any point on the polyline. You use the Make New Polygon dialog box to
specify this distance. For instance, if the polyline represents a road, and you want to see the area that is
within 100 yards of any point on the road, you would specify 100 yards in the Make New Polygon dialog
box, and the resulting polygon would cover the desired area. Once the envelope is created, you can use it,
for instance, to see what other objects fall within it.

If two or more polygon objects are selected, it creates a new polygon object that is the intersection, union,
or difference of the selected polygons, depending on your choice in the Make New Polygon dialog box.
The intersection is the area that all of the selected polygons have in common. The union is the area that all
of the selected polygons cover in total. The difference is the area of the first-selected polygon (the one you
clicked first in the map window), excluding the area of the other selected polygon(s).

Note: For the purposes of Make New Polygon, rectangle and circle objects are treated like polygons.
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The object created by Make New Polygon (the envelope, the union, the intersection, or the difference) is
placed on the Temporary Layer of your User's Map. Objects on the Temporary Layer are deleted when you
quit MARPLOT. If you want to save them, move them to another layer before quitting.


Make New Polyline
Make New Polyline is used after you have selected two or more polyline objects. It creates a new polyline
object on the Temporary Layer that contains all of the segments of the selected polyline objects. It can be
thought of as a union operation for polylines. Note, however, that attributes of the component polylines,
such as street addresses, are not included in the combined polyline.


Polyline <-> Polygon
Polyline <-> Polygon converts the selected object from one type to the other. This is useful, for instance, to
"close off and fill a polyline boundary.
View menu

The items in the View menu are used for navigating around the map,
for saving and using views, and for using the map insets and other
map window displays.

A view is a rectangular window onto a certain area of the world.
When you save a view, MARPLOT records the rectangle, along with
a miniature image of what is shown in the map window at the time
the view is saved.  Depending on the set-up of your MARPLOT
system, there may be a number of views available for your use
beyond those that you have saved yourself. Also, if your MARPLOT
system is multi-user, you can choose whether the saved view is for
your use only, or is to be shared with other users.

Any saved view can be used as a reference view. When a view is
used as a reference view, the miniature image of the view is placed in
an inset on the map window. MARPLOT indicates where on the
reference view the current map view is situated. For instance, if the
reference view shows the entire state of California, and the Los Angeles
window, a flashing box appears on the reference view outlining the Los
California.
   Go to View,,,        Ctrl+R
   Go to Previous View
   Set Scale,,,         Ctrl+j
   Go toLat/Long...     Ctrl+A
   Center on Focus Point Ctrl+T

   Save Current View...  Ctrl+U
   Edit Views,,,
   Entry View,,,

   Reference View            >
   Legend                  >
   Scale Bar                *
   Time Stamp               >•
   Lat/Long Grid              >
   Marked Point              >

   Redraw           Ctrl+D


area is currently shown in the map
Angeles area within the image of
You can designate one of the saved views to be your entry view. When an entry view is set, MARPLOT
will go to that view automatically upon starting up.
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                                                                       Chapter 3: Reference
In the view dialog boxes, you have options as to which views you want to list, and how you want to order
them. If your MARPLOT system is multi-user you have the choice of listing only those views saved by
you, or including also the views shared among all users of the system. Use the "include shared views" box
to make this choice. You can sort the listed views either alphabetically by the name of the view, or
alphabetically by the name of the map the view is associated with. Use the "sort by name" and "sort by
map" buttons to make this choice. Also, if the list of views is long, you can type the first few letters of a
view name in the box at the top of the window and use the Find Next button to locate the desired view in
the list.
Go to View
Go to View is used to return to a previously saved view. The Go to View dialog box appears when you the
choose the Go to View menu item and also when you start MARPLOT if you have not set an entry view.
                        Find:
                       < entire map>. Prince William County, VA
                       < entire map>. King County, WA
                      •SMjf^^^^^^^^^^^^^^
                       PWC Image, Prince William County, VA
<• sort by name
r sort by map
                                                     Map List
                                      Go to View
                                       resize map window to fit view
                                                                    Cancel
                                                                    Help...
The views listed include all the views that have been saved using Save Current View, plus one  view for each map that has a Places layer (these are usually the county maps derived from TIGER
data). Unlike other views, the  views do not have miniature images associated with them.

Select a view by clicking its name in the list. The miniature image of the view is displayed in the lower-left
part of the dialog box. Double-click the view name or click the Go To View button to go to the view.

When the "resize map window to fit view" box is checked, MARPLOT will change the size of the map
window on the screen to match the aspect ratio (width to height) of the window at the time the view was
saved. This is useful if you want to be sure that what is in the window when you return to the view is
exactly what was in the window when you saved the view (actually, such a guarantee is impossible, since
the object or layers might have changed since the view was saved). On the other hand, sometimes this extra
precision might not be worth the cost of having the map window change size automatically, and you will
want to leave this box unchecked.
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                                                                     Chapter 3: Reference
The Map List button brings you to the Map List dialog box. From the Map List dialog box, you can
determine exactly which maps MARPLOT is aware of, and which are in use. From the Map List, you can
go to the view of a map—that is, the rectangle that encompasses the map.


Go to Previous View
When you change your view by any means (e.g., zooming in or out, or going to a view with the Go to View
menu item) you can return to what you were looking at before by using this menu item.


Set Scale

This menu item and dialog box are used to set the viewing scale by entering the scale value by hand. You
can enter the scale in any of the three formats presented. The two other formats change to match the one
you modify.

Note: There are other ways to change the viewing scale, without having to type in numbers. For instance,
the zoom tools and some of the other items in the  View menu change the viewing scale.


Go to Lat/Long

This menu item allows you to enter a latitude/longitude point by hand, and then centers the map about that
point. The default lat/long values presented when the dialog box comes up are the coordinates of the Focus
Point.


Center on Focus Point
This menu item changes the view, without changing the scale, so that the Focus Point is in the center of the
screen.

The Focus Point is the small, flashing target-shaped icon ^ that marks the location of the most recent
point of interest on the map. Every time you click on the map with the arrow tool, the Focus Point moves to
the location of your click. The Focus Point also changes in response to other operations, such as when you
show an object from the Search Collection on the  map.


Save Current View
This menu item is used to add the view that is currently in the map window to the list of saved views. You
are asked to name the view, and to pick the map with which the view is associated. You can only associate
a view with a map that intersects at least part of that view. It is not crucial that you associate the view with
the "correct"  map since the map name is used for reference purposes only and can be changed at any time
using the Edit Views menu item.

If you have edit-level permission, you have the option of allowing the saved view to be shared with other
users of your system. If you want to do so, click the  "share  view with other users" box.
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                                                                     Chapter 3: Reference
Edit Views
This menu item and dialog box allow you to make changes to the list of saved views. If you have edit-level
permission, you can delete or rename views that you have saved.

Note: Renaming a view also gives you a chance to associate it with a different map.


Entry View
This menu item and dialog box let you pick a saved view as your entry view. There are actually three
options regarding the entry view:
  1.   You can choose to have no entry view (click the No Entry  View button), in which case each time
      MARPLOT starts up it will present you with the Go to View dialog box to choose a starting view.
  2.   You can choose a particular saved view as the entry view (highlight the desired view and click the
      Set Entry View button), in which case MARPLOT will go  to the designated view when it starts up.
      The entry view is displayed in the list of views with a small "E" to the left of its name. Note that the
      list of possible entry views includes those views that have been saved with Save Current View, plus
      one  view for each map with a Places layer.
  3.   You can click the "enter to last view from previous MARPLOT session" box, in which case
      MARPLOT will always start at the last view you were  looking at the last time you were using
      MARPLOT.


Reference View
Use this menu item to show and hide the reference view inset, and to pick the view to be shown as a
reference view. Select the view you want to use as a reference view and click Set Reference View.

In most cases, you will want to restrict your choice of reference views to those views that encompass the
current map view. The idea is that a reference view is generally supposed to cover an area that contains the
area of the main view, since the point of the reference view is to show you where the main view is in
relation to a larger area.  It isn't helpful, for instance, if the reference view is showing County A but in the
main view you are zoomed in somewhere in County B.

However, there may be times when you want to  set a reference view to a view that does not quite
encompass the main view. For instance, your main view might be showing the very edge of your map, and
you may want to use a reference view that ends at the edge of the map. In this case, you can check the
"allow any view in reference" box.

Normally, you will want to keep this box unchecked to avoid the mistake of having a reference view that
does not contain the main view. When the box is unchecked, MARPLOT will only allow you to choose a
reference view that contains the current main view. Furthermore,  as you zoom out, MARPLOT will
automatically enlarge the reference view, if possible, to keep the main view enclosed within it.
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                                                                      Chapter 3:  Reference
Legend
Use this menu item to show and hide the legend inset, and to activate the legend panel of the Preferences
dialog box to change the legend settings.


Scale Bar
Use this menu item to show and hide the scale bar inset, and to activate the scale bar panel of the
Preferences dialog box to change the scale bar settings.


Time Stamp
Use this menu item to show and hide the time stamp inset, and to activate the time stamp panel of the
Preferences dialog box to change the time stamp settings.


Lat/Long Grid
Use this menu item to show and hide the latitude/longitude grid on the map window, and to activate the
latitude/longitude panel of the Preferences dialog box to change the grid settings.


Marked Point

The Marked Point -<£>- serves as a reference location. It is useful for measuring distances when the
endpoints of the segment measured are not both visible in the map window. It is also sometimes used when
editing polyline objects such as roads.

You can position the Marked Point either by using the Mark Focus Point item in the Marked Point
submenu of the View menu, or by using the Mark Vertex item in the Vertex submenu of the Objects menu.
You can only mark  a vertex after you have selected a polyline or polygon object with the arrow tool.

When the Marked Point is set, its latitude/longitude coordinates appear at the bottom of the window. When
you choose Mark Focus Point, the Marked Point is positioned at the current location of the Focus Point.
When the Focus Point subsequently moves, the Marked Point retains  the position at which it was set and
only moves when you explicitly set it to a different location. When you choose Mark Vertex, the Marked
Point is positioned at the vertex of the selected polyline or polygon object that is closest to the Focus Point.

Once you have positioned the Marked Point, there are four operations you can perform with it. Three of
these operations are in the Marked Point submenu of the View menu:
   •  Center on Marked Point changes the view, without changing the scale, so that the Marked Point is
     at the center of the map window.
   •  Distance to Focus Point displays the distance from the Marked Point to the Focus Point in the
     current units (see "Preferences" on page 48).
   •  Rescale to Marked & Focus Pts shifts the map and sets the scale such that the Marked  Point and
     the Focus Point are both just visible at the edges of the window.
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                                                                      Chapter 3: Reference
The second item in the Vertex submenu, Move Vertex to Marked Point, is used when you want to position
a particular vertex point of a given polyline or polygon at an exact latitude/longitude point. This operation,
in conjunction with Mark Vertex, is especially important when editing intersecting road segments in
MARPLOT, since MARPLOT only considers roads to intersect when they have a common vertex. For
example, suppose you have created two roads called A and B. You intend for them to intersect, but as you
use the polyline tool to create them in MARPLOT, you do not have the accuracy to ensure that a vertex of
A is in the exact same location as a vertex of B. To force the vertices to line up, you can click near the
desired vertex of road A and choose Mark Vertex. Then click near the matching vertex of road B and
choose Move Vertex to Marked Point. The vertex of B is shifted so that it exactly coincides with the
marked vertex of A. Now MARPLOT considers the two roads to intersect. For a step-by-step example of
this technique, see "Editing road segments" on page 108.

When you use Clear Marked Point in the Marked Point submenu, the Marked Point disappears from the
screen and its latitude/longitude coordinates are no longer displayed.


Redraw
The drawing of a large view can be time-consuming. You can interrupt the drawing by pressing the ESC
key or by clicking anywhere on the map with the mouse. This causes the drawing to stop and allows you to
perform operations on a partially drawn view. You can then use the Redraw menu item to force the same
view to be redrawn completely.

Note: When you cancel the drawing of a view, MARPLOT behaves as if all of the objects are there on the
screen. For instance, you can click on the "invisible" objects to select them. Similarly, any objects that
were selected before the view was drawn will be remain selected when you cancel the drawing, even if
they didn't actually get drawn. If you find you are frequently having to stop the drawing of a map, consider
using the Layer List dialog box to set the viewing scale of certain layers to keep them from drawing when
you are zoomed out too far.
List  menu
This menu contains items for searching and using the resulting        Search,.,             Ctrl+F
Search Collection (that is, the list of found objects).                  show Search Collection   Ctrl+G
                                                                Copy to Search Collection Ctrl+V
It is also used to access the list of layers and the list of maps.
                                                                Layer List...           Ctrl+L
                                                                Map List,.,            Ctrl+M
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                                                                        Chapter 3: Reference
Search
The Search Criteria dialog box, which comes up when you select the Search menu item, is used to find
objects according to various criteria you specify.

There are three types of criteria that you must specify to do a search:
  1.   What type of search do you want to do? In the pop-up box following the words "Search for objects
      that:" there are seven choices for the type of search:
      a.  Have  any name - This choice indicates that you want all objects on the specified maps and
          layers. Use this option with some caution since you can easily specify several thousand
          objects—perhaps more than MARPLOT will be able to list on your system.
      b.  Have  names that start with... - In this case, you type the first few letters of the name of the
          object(s) you are looking for in the box to the right of the pop-up. Do not type a directional
          prefix in the box. For instance, if you are looking for E Cedar St, just enter Cedar.
      c.  Have  names that contain... - In this case, you type letters that are to be found somewhere
          within the name of the object(s) you are looking for. This type of search is usually more time-
          consuming that using the "have names that start with..." option. As with that option, do not type
          a directional prefix in the box.
      d.  Are within... - Here you want to find all objects that are within a specified distance from the
          Focus Point, from the Marked Point (if it is set), or from another set of objects. In this case, you
          enter the desired distance, including the units, and choose as the  reference the Focus Point, the
          Marked Point, the set of currently selected objects, or the set of objects in the previous Search
          Collection (i.e., those found in the previous search or the previous Copy to Search Collection
          operation). This type of search can be time-consuming,  so you will want to use it carefully, and
          be as specific as possible about the layers and maps to be searched.
      e.  Are not within... - This is similar to the "are within..." option, except it finds objects that are
          not within the given distance from the given reference.
      f  Are inside of or touching... - Here you want to find all objects that are touching the Focus
          Point, the Marked Point (if it is set), or another set of objects. (Note: For polygon, rectangle, or
          circle  objects, touching can mean being completely or partially inside the borders.) For example,
          finding all objects that "are inside of or touching..." a given polygon object will find objects
          completely or partially inside the polygon. This search is the same as finding all objects "are
          within..." 0 miles of the given reference.
      g.  Are outside of and not touching... - This is similarto the "are inside of or touching..." option,
          except it finds objects that are not inside of or touching the given reference.
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                                                                      Chapter 3: Reference
  2.   Which layers do you want to search? In the pop-up box following the words "Layer(s) to search:"
      there are three choices:
      a.  All Layers - This indicates that you want to search all layers. You would use this when you are
         unsure which layers the desired objects might be found on.
      b.  Multiple Layers... - Here you want to search on more than one layer, but instead of simply
         choosing "All Layers," you want to explicitly check each layer to be searched. In this case, a
         small scrolling box appears in which you can click on the names of the layers you want to
         search. A check appears to the left of the names of the clicked layers. Clicking a checked layer
         removes the check. Clicking in the "all layers" box checks or unchecks all layers. Note that you
         must check at least one layer to perform a search.
      c.  Individual Layer... - Here you know that the desired object is to be found on a given layer. In
         this case, a second pop-up box appears in which you can select the layer to be searched.

Note: You may note that in the list of layers presented in the pop-up box, layers with names such as Roads
(Major) are not included. Instead, just the Roads layer appears. For the purposes of searching, it is assumed
that when you want to search Roads, you also want to search Roads (Major). The same holds true for any
layers whose names are the same except for a word in parentheses.

  3.   Which maps do you want to search? In the pop-up box following the words "Map(s) to search:" you
      have three choices:
      a.  All Maps - This indicates that you want to search all maps that are currently available. You
         would use this when you don't know (or don't want to spend time thinking about) which maps
         the desired objects are to be found on. In many cases, there is no noticeable loss of efficiency
         when using this option. However, if you are searching on a layer such as Roads and have a
         number of maps with many roads, the search is much more efficient if you can specify the
         map(s) to be searched.
      b.  Maps in View - This is the most common setting. Here you want to search only the maps that
         are shown (at least partially) in the current view. The idea is that if you are currently looking at
         the map, it is likely that you want to search for an object on that map. An important note about
         this option is that many maps are  always considered to be "in view." In fact, only those maps
         that have a Places layer (which in most cases means those maps derived from Census TIGER
         files) are ever considered to be not in view. All other maps, such as your User's Map, are always
         in view, even when no objects on these maps are visible on the screen. Thus, the "Maps in View"
         option can be thought of as "all maps, except those maps with a Places layer."
      c.  Selected Maps... - Here you know exactly which map(s) you want to search. In this case, a
         small scrolling box appears in which you can click on the names of the maps to be searched. A
         check appears to the left of the names of the clicked maps. Clicking a checked map removes the
         check. Clicking in the "all maps" box checks or unchecks all maps. Note that you must check at
         least one map to perform a search.

Once you have specified all the necessary criteria, click the Search button to execute the search. While
MARPLOT performs the search, it displays  messages at the bottom of the map window. If the search is
taking too long, you can press the ESC key to stop it, in which case the incomplete results of the search are
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displayed. When the search is complete, the objects found to match the specified criteria are put into the
Search Collection, and the Search Collection dialog box is shown.

In most cases, you will want to replace any previous contents of the Search Collection (that is, the results
of the previous search) with the new list of found objects. This is reflected by the "replace previous
collection" choice at the bottom of the Search Criteria dialog box. However, sometimes you may want to
keep the contents of the previous Search Collection, but add the newly found objects to the list. In this case
you would choose the "add to previous collection" option. Finally, there may be times when you want to
search based on the given criteria, but only include objects that were already in the previous search
collection (that is, you want to find a subset of the previous search collection). In this case, you would
choose the "subsearch of previous collection" option.
Search Collection dialog box
This dialog box displays the list of objects that resulted from the most recent search, or from the most
recent use of the Copy to Search Collection menu item.The objects are listed in alphabetical order. You can
move quickly to a certain part of the list by typing the first few letters of the name you want.
Search Collection
Number of objects in collection: 807 { plus 26 aliases }
Object Name
/v Oakland Ct
/••/ Oakland Dr
/v Oaklawn Ln
/v OatCt
/v Ocelot Dr
Old Bridge Ln fO/d Bridge Rd}
s-./ Old Bridge Rd
/v OldDelaneyRd
Old Te/egrap/i fid { Te/egrap/i fid}
/v Oleander D
/v Olive D
/"v OlivewoodDr
Layer Place/Map
Roads Dale City CDP
Roads Dale City CDP
Roads Dale City CDP
Roads Dale City CDP
Roads Dale City CDP
Roads Lake Ridge CDP, .

M.





Roads Lake Ridge CDP, ...
Roads Dale City CDP
—
Roads Prince William County, VA
Roads Dale City CDP
Roads Dale City CDP


Roads Prince William County, VA •»
1 make all other objects on these layers invisible
Save Collection... Interse
Load Collection... Add re

ctions Show All on Map
sses Show on Map 8 Zoom

Show on Map


Help...
Close

Each object in the list is displayed with its name, the name of its layer, and its place or map name. If the
object is in a particular place that is included on the Places layer of its map, that name will be used. For
instance, the place might be "Lake Ridge CDP." If the object is not classified as being in a place on the
Places layer, the name of its map will be used. If the object is classified as being in a place, but is also in
other places, the name of the place will end with "..."as in "Lake Ridge CDP, ...".
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When an object in the list appears in italic type and its name is followed by another name in braces, it
means the name is an alternative name for the object whose name is in braces. For instance, if you see
Main St {State Hwy 1} in italics, it means that the object named State Hwy 1, or at least some section of it,
is also called Main St. Thus, the Main St object is not actually an object in its own right, but just a
reference to the true object: State Hwy 1. Such references are called aliases in MARPLOT. The Search
Collection dialog box shows the total number of aliases, along with the total number of real objects.

A checkbox on this dialog box gives you the option to "make all other objects on these layers invisible."
This can be used to hide the other objects temporarily so that you can concentrate on the objects that you
placed in the Search Collection. Note that when you are using this option, the words "Search Collection"
will appear on the lines of the affected layers in the Layer List dialog to remind you that those layers are
being controlled by the Search Collection.

When you have highlighted an object in the list, you can show the object on the map by clicking the Show
on Map button. The map is redrawn and shifted, if necessary, to show the selected object. If you click the
Show on Map & Zoom button, when the object is shown the scale of the map will change so as just to
encompass the object in the map window. This is especially useful when the object to be shown is a
boundary-type object, such as a city or county boundary.

Alternatively, you can click the Show All on Map button, in which case all objects in the Search Collection
will be selected and shown on the map. The view is rescaled, if necessary, to include all of the objects.

For certain objects, you can also click the Addresses or Intersections buttons to get a list of the address
ranges or intersections for the selected object.

In some cases, you may want to save the list of objects in the Search Collection to your computer, so that
you can use them again any time in the future. You can do this using the Save  Collection button. You are
prompted for a file name to save the Search Collection into. This file has an MSC extension, which stands
for MARPLOT Search  Collection. Note that MARPLOT provides a folder called SEARCHES as a
convenient place to store your saved Search Collections.  If your MARPLOT system is multi-user, each
user has his or her own SEARCHES folder.

To retrieve a previously saved Search  Collection, use the Load Collection button. The loaded collection
can replace, be combined with, or serve  as a filter on the current Search Collection, depending on your
choice at the bottom of that dialog  box.

Click Close when you are done working with the Search Collection.
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                                                                        Chapter 3: Reference
Intersections dialog box
This dialog box lists the objects that intersect the object highlighted in the Search Collection.
Intersect ians
Intersections for object: 1-66
on layer: Roads
of map: Prince
F Intersect with all layers
Number of intersections found:
Object Name
1 Antiuuh Rd
GrovetonRd
1-66
1-66
Lee Hwy
fiaufc 723 { Tamer Rd}
Stale Rattle 234 { Sadie? Rd}
State Rte 234 Byp

[Major]


William County, VA

25 {plus
Layer
Roads
Roads
Roads [Major

3 aliases}
Place/Map
Prince William County, VA D 1
Prince William County, VA _
Gainesville CDP
Roads (Major) Hayrnarket town
Roads (Major) Gainesville CDP, ...
Roads
Prince William County, VA
Roads (Major) Prince William County, VA
Roads (Major
Show on Map Show on Map & Zoom
Prince William County, VA »
Cancel Help...

Note: For the purposes of this dialog box, MARPLOT only considers two polyline objects to intersect if
they share a vertex exactly. Thus, if you simply draw two polylines that cross one another, they will most
likely not intersect according to this dialog box, even though they cross each other on the screen. This
dialog box is intended for finding intersections in polyline data that has been imported from an external
source, such as the TIGER/Line database, where intersecting polylines always share a vertex. If you want
to find intersections with arbitrary data, you can do so using MARPLOT'S Search function with a "within"
or "touching" option. Searching in this way is more flexible, but significantly slower than, this intersection
function.

As with objects in the Search Collection dialog box, the intersections are listed with their names, the names
of their layers, and the names of their place or map. When you have highlighted an intersecting object in
the list, you can show the intersection on the map by clicking the Show on Map button. The map is
redrawn and shifted, if necessary, to show the point of intersection. The Show on Map & Zoom button
shows the intersection at a scale that is appropriate for viewing typical road intersections.

The check box labeled "Intersect with all layers" is used when you want to find intersections between
objects on different layers. For instance, suppose you want to find the places where a road intersects with
various rivers. You would select an object on the Roads layer in the Search Collection dialog box and click
the Intersections button. By default, only the intersecting objects from the Roads and Roads (Major) layers
will be included in the list of intersections. But if you check the "Intersect with all layers" box, intersecting
objects from all layers will be included. Thus, any river objects on the Water layer that intersect the road
will be in the list.
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                                                                     Chapter 3: Reference
Note: MARPLOT treats the Roads and Roads (Major) layers as being the same layer as far as intersections
are concerned, so you do not have to check the "Intersect with all layers" box to find the intersection
between a road and a major road. Whenever two layers have names that differ only by a suffix in
parentheses, MARPLOT intersects them with each other automatically.


Addresses dialog box
This dialog box lists the address ranges for a street.

When you have highlighted an address range in the list, you can show the segment of the street that
corresponds to that address range by clicking the Show on Map button. The map is redrawn and shifted if
necessary to show the chosen segment. The Focus Point is placed on the center of the chosen segment, so
that you can identify it.

The Show on Map & Zoom button shows the address range at a scale that is appropriate for viewing
typical road segments.


Show Search Collection
This menu item opens the Search Collection dialog box, which displays the list of objects that resulted
from the most recent search, or from the most recent use of the Copy to Search Collection menu item. For
more information on the Search Collection dialog box, see "Search Collection dialog box" on page 62.


Copy to  Search Collection
Often the set of objects that is currently selected on the map is meaningful to you. For instance, suppose
you have selected the 20 objects on your Schools layer that fall within a certain circle. You can  easily find
the names of the selected objects by copying them to the Search Collection using this menu item. The new
Search Collection is then displayed, listing the schools by name. Once the selected objects are in the
Search Collection, they will stay there, even after they are no longer selected, until the next time you
explicitly modify the Search Collection by doing a search or another Copy to Search Collection.
                                             65

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                                                                       Chapter 3: Reference
Layer List
This dialog box presents a list of all the layers. The layers can be listed either in alphabetical order or in
their top-to-bottom order, with the top-most layer at the top of the list. The top-to-bottom order of the
layers is important because the layers are drawn in order from bottom to top. Thus, objects on higher layers
can be drawn over objects on lower layers. Similarly, when you click on the map at a location with objects
from more than one layer, the object from the highest layer will be selected.
Layer List
r alphabetical
(•' draw order
Show +
Names Show Range Hide
\ fl CAMEO Hospitals V
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A
A
A
TD
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CAMEO Incidents
CAMEO Scenarios
CAMEO Schools
CAMEO Transportation
Roads (Major)
Roads
Railroads
ALOHA
Water
CAMEO Hospita
ff Objects: 2 on
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For each layer, the list gives several columns of information. You can click on any of these columns to
change the settings for the given layer. The columns, from left to right, are as follows:
  1.   Layer lock status - At the start of each MARPLOT session, every layer is locked, indicated by a
      closed padlock icon i. When a layer is locked, you cannot make any changes to the objects on that
      layer, such as moving the objects, renaming them, or changing their color. To unlock a layer, click
      its lock icon rtt. When you have unlocked one or more layers, the list of tool icons on the left edge
      of the map window is extended to offer tools for creating new objects. Although all users can unlock
      layers, users without browse-level permission are restricted to editing those layers on their personal
      user's map only. You must have edit-level permission to edit other maps. Note: When the lock icon
      for a layer is gray a instead of black, it indicates that the given layer has been locked by another
      application sharing information with MARPLOT. In effect, the layer is "owned" by that application.
      You can unlock 'fe such a layer, but the changes you can make to objects on that layer are restricted
      to those made by the use of the graphical menu items in the Objects menu.
                                              66

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                                                                       Chapter 3:  Reference
  2.   Layer name - Clicking on a layer's name simply highlights the layer in the list. If a layer's name
      appears in italics, it indicates that the layer is temporary, meaning that all objects on the layer will be
      deleted when the current MARPLOT session is terminated.
  3.   Show + Names - Clicking in this column means that you want to turn the layer on (i.e., show the
      objects on the  layer), regardless of the map scale. Further, you want the objects to be labeled with
      their names, regardless of the map scale.
  4.   Show - Clicking in this column means that you want to turn the layer on (i.e., show the objects on
      the layer), regardless of the map scale. The objects will only be labeled with their names at certain
      scales, as set by the Layer Scale Ranges dialog box.
  5.   Range- Clicking in this column means that you want to turn the layer on (i.e., show the objects on
      the layer) only within the range of scales set by the Layer Scale Ranges dialog box. Similarly, the
      objects will only be labeled with their names at certain scales, as set by the Layer Scale Ranges
      dialog  box.
  6.   Hide - Clicking in this column means that you want to turn the layer off (i.e., not show the objects
      on the  layer), regardless of the map scale
      Default Graphics - Clicking in this column \mm\, represented at the top by a pair of identical
      symbol icons, means that you want all objects on the layer to be drawn using the default graphical
      settings for the layer, as set using the "Default graphics" control in the boxed area below the list of
      layers. This gives the objects on the layer a uniform look, and also allows you to change the look of
      all objects on the layer simply by changing the default graphics for the layer. Note that in this
      column, instead of a check mark, a small sample of the default graphics for the layer is displayed.
  8.   Individual Graphics - Clicking in this column |™Ea| , represented at the top by a pair of icons that
      are not identical, means that you want the objects on the layer to be drawn using their individual
      graphical attributes, as set by the Object Settings dialog box. In this case, the "Default graphics" for
      the layer are not used, and the objects on the layer may look very different from one another
      (although typically most or all of the objects on a layer will have identical individual graphical
      attributes and will look the same).

There is a small button at the top of each of the last six columns. Clicking this button is the same as
clicking in the given column for all layers. For instance, if you wanted to quickly hide all layers except
one, you would click the small button at the top of the Hide column to hide all layers, then click in the
Show column of the desired layer.
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                                                                       Chapter 3: Reference
The boxed area just below the list of layers gives information specific to the layer that is currently
highlighted in the list. You can use this area to:
   •   View how many objects are on the layer, and how many maps the layer is represented on.
   •   Use the Rename button to give the layer a different name. WARNING: Renaming a layer can cause
      trouble when you have previously linked objects on that layer to database programs since the
      database program's link to the object involves the name of the object's layer. As a rule, you should
      only rename layers that you have created by hand yourself.
   •   Use the Move button to move the layer up or down in the  list of layers. This option is only available
      when the layers are listed in top-to-bottom order (that is, when the alphabetical box is not checked).
   •   Use the Scale Ranges button to set the scale ranges for the layer (see "Layer Scale Ranges dialog
      box" on page 70).
   •   Use the Set button to set the default graphical attributes for the layer.

Note: The line style width setting is also used as the setting for the size of the dots, when symbol objects
on the layer are shown as dots, according to the Layer Scale Ranges dialog box.
      A note on default graphics

      By default, in the Default Graphics column of the list of layers, a small symbol icon is
      displayed to show a sample of the look of objects on that layer. However, some layers
      contain predominantly objects that are not symbols (points) but polylines or polygons.
      For instance, a Roads layer would contain only polylines and a Counties layer would
      contain only polygons. With such a layer, you can choose as the default symbol either the
      polyline or the polygon symbol that appear near the start of the table of symbols. When
      one of these is chosen as the default layer symbol, MARPLOT draws a small polyline or
      polygon instead of a small symbol in the layer's Default Graphics column in the layer list.
      Similarly, when the default line style pattern is chosen to be the railroad pattern,
      MARPLOT draws the railroad pattern instead of a symbol in the Default Graphics
      column.
You can use the New and Delete buttons to create or delete layers. You must unlock a layer before
attempting to delete it. Usually, you will only create and delete layers that you intend to use on your
personal user's map.

WARNING: Deleting a layer deletes all objects on that layer. This can cause trouble when you have
previously linked objects on the layer to database programs, since the database program might consider a
linked object to exist even though it has actually been deleted.
                                              68

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                                                                       Chapter 3: Reference
Layer List groups.  Layer groups give you a way to group layers in the Layer List in order to view and
operate on them more conveniently.
Layer List
1 alphabetical
'*• draw order
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CAMEO Incidents
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A layer group is just a collection of layers. You create a layer group by clicking the New button in the
Layer List dialog box (you are given the choice of creating a new layer or a new group). Move a layer into
a group by highlighting the layer and selecting Into Group from the Move pop-up menu. Move a layer out
of a group by highlighting the layer and selecting Out of Group from the Move pop-up menu.

A layer group can be opened or closed. Close the group by clicking on the black triangle to the left of its
name. Click on the triangle again to re-open the group. The layers in a closed group are treated just like
other layers; they are just hidden from view in the Layer List. The downward-pointing triangles at the tops
of columns of an open group can be used to set all of the layers in the group with a single action. For
instance, clicking in the triangle in the Show column puts all layers in the group into show mode.

To set the scale ranges or default graphics for all layers in a group simultaneously, highlight the group
name and use the Scale  Ranges button or default graphics pop-up menu.

Deleting a layer group will delete those layers it contains that have no objects. The layers which contain
objects are retained in the Layer List.
                                              69

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                                                                       Chapter 3: Reference
Layer Scale Ranges dialog box.  The purpose of this dialog box is to allow you to set four scale
values related to the display of the given layer (or group). The dialog box presents a scale "ruler" that
ranges from a largest (most zoomed-in) scale of" 1 inch = 0.01 mi" to a smallest (most zoomed-out) scale
of" 1 inch = 413 7 mi". To visualize the scale ruler, you might imagine that you are in a helicopter. At the
bottom of the scale ruler, you are very close to the earth and can only see a small amount of land. As you
rise higher and higher you see more and more land, until you reach a height, at the top of the scale ruler,
where the entire earth is within view.
           Layer Scale Ranges
            Layer: Roads (Major)
                                               Dots   @  1 in = 250.15 mi
                      current scale:  •• "
                      1 in = 5.71 mi
                                            ii