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| General Listing |
Title of Listing: | | Land Use and Land Cover Digital Data |
Category: | | Maps/Geographic Data |
Subcategory: | | US Geological Survey-USGS, All Listings |
Date: | | |
Document #: | | |
Web Site: | | http://www.fgdc.gov/FGDP/Land_Use_&_Land_Cover_Digital_Data.html |
Email: | | custserv@edcmail.cr.usgs.gov |
Abstract: | |
Land use and land cover (LULC data are derived from thematic overlays registered to 1:250,000-scale base maps and a limited number of 1:100,000-scale base maps. Land use and land cover data provides information on urban or built up land, agricultural land, rangeland, forest land, water, wetlands, barren land, tundra, and perennial snow or ice. Associated maps display information in five data categories: (1) political units, (2) hydrologic units, (3) census county subdivisions, (4) Federal land ownership, and (5) State land ownership.
The 1:100,000- and 1:250,000-scale LULC and associated maps used to produce the digital files are polygon, or area, maps. Areas consisting of uniform structures and similar characteristics are compiled on the map as a series of lines forming a polygons. Each polygon is identified with an attribute code, derived from a modified Anderson level II scheme, describing the area. Digitized map information is processed through the Geographic Information Retrieval and Analysis System to produce data in two formats: the vector polygon and the composite grid cell formats.
In the vector polygon format, all topological elements of the polygon map are represented as points, lines, and areas that (with special software) may be joined to form polygons replicating the graphic map. In the composite grid cell format, the map is divided into 4-hectare (10-acre) cells. Each cell is completely identified with attribute codes for all LULC and associated map data. Digital LULC and associated maps are stored in the UTM coordinate system.
USGS Information Services accepts fax and mail orders only.
Visit the USGS at http://edcwww.cr.usgs.gov/webglis or http://mapping.usgs.gov
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Topics
Land Use, Mapping/GIS
Additional Topics/Tags/Keywords
Boundaries, Airports, Census, Geography, Wetlands
Organization: | | US Department of the Interior (DOI), US Geological Survey (USGS) |
Address: | | Information Services
Box 25286 | Phone: | Description | Number |
City: | | Denver | | Information Services | (800) 435-7627 |
State/Province/Territory: | | CO | 2. | Earth Science Information Center | (800) 872-6277 |
Zip/Postal Code: | | 80225 | 3. | EROS Data Center | (605) 594-6151 |
Country: | | United States | 4. | Fax: | Information Services (303) 202-4693 |
Branch Locations: | |
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