The "Soil Survey Spatial and Tabular Data (SSURGO 2.2)" product includes both spatial and tabular soil data for those soil survey areas for which both are available. Every soil survey area listed here is also listed under the product named "Soil Survey Tabular Data Only".
Title: Soil Survey Tabular Database
Originator:
Abstract:
This tabular dataset contains estimated and measured data on the physical and chemical soil properties, soil interpretations, and static and dynamic metadata. Most tabular data exist in the database as a range of soil properties, depicting the range for the soil survey area. In addition to low and high values for most data, a representative value is also included for these soil properties. Data are obtained from a combination of field observations, site descriptions and transects, and laboratory analyses.
In making the soil survey, soil scientists observed landforms and landscape features, such as the steepness, length, and shape of slopes; the general pattern of drainage; the kinds of crops and native plants growing on the soils; and the kinds of bedrock. They observed and studied many soil profiles.
Samples of some of the soils in the area were collected for laboratory analyses and for engineering tests. Soil boundaries were drawn on the soil maps and a locally tailored tabular database was constructed, based on those observations and the resulting landscape model the soil scientist developed.
These data can be used with their companion field maps. For additional information contact the U.S. Department of Agriculture, Natural Resources Conservation Service, State Soil Scientist. Their contact information is available at http://soils.usda.gov/contact/state_offices/.
A Microsoft Access template database has been prepared for use with the Soil Survey Tabular Database and is available at http://soildatamart.nrcs.usda.gov/Templates.aspx
The static tabular metadata documents the underlying data structure, independent of the actual data contained in an export. The dynamic metadata documents the contents of a particular export. The structure of the static and dynamic metadata tables can be viewed online via the URL http://soildatamart.nrcs.usda.gov/SSURGOMetadata.aspx.
Format: Text files (.txt) in ASCII, pipe (|) field delimited and double quote text delimited format.
Spatial Reference Information: N/A
Title: Soil Survey Geographic Database (SSURGO 2.2)
Originator:
Abstract:
SSURGO depicts information about the kinds and distribution of soils on the landscape. This dataset is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetrically correct base and digitizing, or by revising digitized maps using remotely sensed data and other information. This dataset consists of georeferenced digital map data, computerized tabular attribute data, and associated metadata. The map data are in soil survey area extent format and include a detailed, field-verified inventory of soils and miscellaneous areas that generally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. A special soil features layer (point and line features) is optional. This layer displays the location of features too small to delineate as polygons at the mapping scale but large enough and contrasting enough to significantly influence use and management. The soil map units are linked to attributes in the Soil Survey Tabular database, which gives the proportionate extent of the component soils and their properties.
The soil map and data used in the SSURGO product were prepared by soil scientists as part of the National Cooperative Soil Survey.
A Microsoft Access template database has been prepared for use with the Soil Survey Tabular Database and is available at http://soildatamart.nrcs.usda.gov/Templates.aspx
The static tabular metadata documents the underlying data structure, independent of the actual data contained in an export. The dynamic metadata documents the contents of a particular export. The structure of the static and dynamic metadata tables can be viewed online at http://soildatamart.nrcs.usda.gov/SSURGOMetadata.aspx.
Digital versions of hydrography, cultural features, and other associated layers that are not part of the SSURGO dataset may be available from http://datagateway.nrcs.usda.gov/, or from Geospatial One-Stop at http://www.geodata.gov/gos .
Format: Vectors, polygons, and lines – ESRI Shapefile, coverage, and interchange (e00).
Spatial Reference Information: Decimal Degrees, North American Datum 1983
