Title: Soil Survey Geographic Database (SSURGO 2.2)

Originator: U.S. Department of Agriculture, Natural Resources Conservation Service


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 soil scientists at 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 tabular data can be used with their companion general soil maps. For additional information contact the U.S. Department of Agriculture, Natural Resources Conservation Service, and State Soil Scientist. Their contact information is available at https://www.nrcs.usda.gov/wps/portal/nrcs/sitenav/national/states/. For questions concerning these data please visit https://soils.usda.gov/survey/geography or email SoilsHotline@lin.usda.gov.

There is a STATSGO2 web page off the main Soils page that provides information the Digital General Soil Map of the United States https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/geo/?cid=nrcs142p2_053629.

The 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.

Format: vector polygons, points and lines - ESRI Shape File

Spatial Reference Information: Decimal Degrees, World Geodetic System 1984

Sample map