U.S. Terrain Areas
U.S.Terrain Areas provide terrain information derived from the State Soil Geographic (STATSGO) database that was developed by the U.S. Agriculture's Natural Resources Conservation Service (NRCS). The STATSGO database was designed for resource planning at a regional level. Examples of terrain attributes are slope, bedrock depth, water table depth, rock hardness, and surface texture. U.S. Terrain Areas cover the continental United States, Alaska, Hawaii, and Puerto Rico. The datum of the maps is NAD 27, and the scale is 1:250,00, except for Alaska, which is 1:1,000,000.
U.S. Terrain Areas is actually two products in one. It includes a set of digital maps for display purposes and a companion set better suited for geographic processing. the display version contains the original, unaltered geographic terrain areas and is perfect for online viewing and map-making. The above image illustrates the display version of U.S. Terrain Areas.
The companion set contains the same terrain information in digital maps that are optimized for geographic processing. The geographic areas are gridded, resulting in areas that are no larger than one-tenth of a degree of longitude by one-tenth a degree of latitude. The gridded format of U.S. Terrain Areas helps cut down the processing time of intensive spatial joins with the product.
U.S. Terrain Areas is an excellent source of terrain information for resource planning, management, and monitoring at a regional level; multi-county, state, multi-state, etc.
Each set (display and gridded) of the U.S. Terrain Areas database consists of one table for each of the 50 states, plus Puerto Rico.
MapInfoArcView GIS and ARC/INFO
MUID: STATSGO terrain area identifier
SlopeL: Minimum value for the range of slopes
SlopeH: Maximum value for the range of slopes
SurfTex: Predominant surface texture
AnFlood: Annual flooding frequency
AnFloDur: Annual flooding duration
AnFloEnd: Month during which flooding ends
AnFloBeg: Month during which flooding begins
WTDepL: Minimum value for the range of depth to water table
WTDeptH: Maximum value for the range of depth to water table
RockDepL: Minimum value for the range of depth to bedrock
RockDep: Maximum value for the range of depth to bedrock
RockHard: Degree of hardness of bedrock
HydGrp: Hydrologic group for the soil
Drainage: Drainage class of the soil
hydric: Hydric soil identifier
CorCon: Concrete corrosion susceptibility rating
CINIrr: Non-irrigated agricultural usage rating
SCINIrr: Non-irrigated agricultural usage subclass
PrimFml: Prime farmland classification
PRICE:$6,000 / US (call for multi-user licensing)
DOWNLOAD a free sample of U.S. Terrain Areas.
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