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U.S. Geological Survey
(USGS)
USGS: Topological - Landuse/Landcover, Watersheds,..
Data Source:
National Cartographic Information Center
U.S. Geological Survey
User Services Section
507 National Center
Reston, VA 22092
Phone: 703-860-6045
Data Format:
Vector files in GIRAS format
Raster available in binary or character (ASCII or EBCIDIC) form
Scale/Resolution:
Vector - 1:100000 ; 1:250000
Raster - 200 meters
Data Coverage:
For coverage information write/call
NCIC for latest edition of
"Index to Land Use and Land Cover Information".
Data Description:
Separate data files are available for the following:
- landuse/landcover
- political units
- census county subdivisions
- hydrologic units(watersheds)
- federal land ownership(park,forest,..)
A Composite Theme Grid (CTG) is also available
which contains all the themes (landuse,census,..)
available for a given area. For more information
about file format contact the above address for
USGS Circular 895-E, "Land Use and Land Cover Digital Data"
Media:
9-track ASCII tapes & paper maps
Aquisition Costs:
- Landuse/Landcover $100.00
- Census Tracts $50.00
- Political Boundaries, Hydrologic Units, &
Federal Lands $35.00
- Composite Theme Grid (CTG) $250
Comments:
Data are provided in arc-node format known as
GIRAS. Programs are available to convert this to the
Digital Line Graph (DLG) standard. For more information
about GIRAS to DLG conversion, contact the above address.
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Automatically created on: Tue Mar 30 00:23:51 2004