Description
The Atlas layers consist of a reliable summary of national-scale geographical information.
The data source is National Atlas of the United States®. The
National Atlas of the United States® is intended to provide a comprehensive,
map-like view into the enormous wealth of data collected by the Federal Government.
Depending on the vector layer, they will appear in the map interface layer list at different scales.
Examples of some layers available are:
PRINCIPAL_AQUIFERS
GLACIAL_AQUIFERS
WILDERNESS_AREAS
AGRICULTURE_CENSUS
HUCS_P
STREAMS_WATERBODIES_P
STREAMS_WATERBODIES_L
PARKWAYS_RIVERS
DAMS
RAILROAD
ROADS
AIRPORTS
STATES
COUNTIES_2001
COUNTIES_2000
COUNTIES_1990
COUNTIES_1980
ARSENIC GROUND WATER
FOREST COVER TYPES
FOREST FRAG CAUSE 1KM
FOREST FRAG CAUSE 270M
FOREST FRAG CAUSE 540M
FOREST FRAG CLASS
LAND COVER CHAR
LAND COVER DIVERSITY
NORTH AMERICA SHADED RELIEF
NIGHT LIGHTS
As more data layers are acquired,
they will become available for download from the Seamless Data Distribution System.
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Specifications
National Atlas Layers
|
| Projection
|
Geographic
|
| Horizontal Datum
|
NAD83
|
| Vertical Datum
|
NAVD88
|
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Format Information
Shapefile (.shp)
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Download Information
|
National Atlas Layers
|
| Delivery
Options |
Cost |
Format |
Availability |
|
Downloadable
size will vary depending the vector layer |
No
Charge |
Shapefile (.shp) |
Coverage depends on vector layer
|
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| 
