|
Digital Map
Databases Sample Maps of Americas Sample Maps of Cape Hatteras |
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Digital map databases for use
with Versamap:
| Database |
Coverage |
Number
of Points |
Number
of Geofeatures |
Resolution |
| VMWD |
World |
220,000 |
10 |
1 minute of
arc |
| WDB-II |
World |
5,800,000 |
36 |
1 second of
arc |
| USGS DLG |
USA |
7,000,000 |
72 |
1 second of arc |
Sample maps of the
Western
Hemisphere:
The following maps of the Western Hemisphere, on an Orthographic
projection, illustrate
the geographic features and amount of detail present in the Versamap
Micro World Database and in World Data Bank II. The maps show all
geographic features in each
database.
Versamap Micro World Database: Western hemisphere.
Versamap World Data Bank II: Western hemisphere.
Sample maps of Cape Hatteras:
The following maps of Cape Hatteras are drawn on an Equirectangular
projection, and cover exactly the same area. Each map illustrates
the geographic features and amount of detail present in 1 of the 3
digital map databases available for use with Versamap.
The maps drawn with the Versamap Micro World Database, and Versamap
World Data Bank II show all geographic features present in these
databases. The map drawn with the Versamap USGS Digital Line
Graphs shows only a portion of the geographic features present in the
database.
Versamap Micro World Database: Cape Hatteras showing all geographic
features in the database.
Versamap World Data Bank II: Cape Hatteras showing all geographic
features in the database.
Versamap USGS Digital Line Graphs: Cape Hatteras showing the
coastline; islands; perennial
rivers and lakes; and state and county boundaries. Most
geographic features, such as roads; railroads; canals; national parks;
and intermittent rivers and lakes are not shown.
