Description: This data set is a
combined coverage including detailed SSURGO data where available, and STATSGO
data where SSURGO data is not available. Consult the web soil survey website
for complete metadata for SSURGO soil surveys and the State Soil Geographic
(STATSGO) data set.
STATSGO abstract: This data set consists of general soil association units. It was
developed by the National Cooperative Soil Survey and supersedes
the State Soil Geographic (STATSGO) data set published in 1994.
It consists of a broad based inventory of soils and nonsoil areas
that occur in a repeatable pattern on the landscape and that can
be cartographically shown at the scale mapped. The data set was
created by generalizing more detailed soil survey maps. Where more
detailed soil survey maps were not available, data on geology,
topography, vegetation, and climate were assembled, together with
Land Remote Sensing Satellite (LANDSAT) images. Soils of like areas
were studied, and the probable classification and extent of the soils
were determined.
Map unit composition was determined by transecting or sampling areas
on the more detailed maps and expanding the data statistically to
characterize the whole map unit.
This data set consists of georeferenced vector digital data and
tabular digital data. The map data were collected in 1-by 2-degree
topographic quadrangle units and merged into a seamless national
data set. It is distributed in state/territory and national extents.
The soil map units are linked to attributes in the National Soil
Information System data base which gives the proportionate extent of
the component soils and their properties.
SSURGO abstract: This data set 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 planimetric correct base and digitizing,
or by revising digitized maps using remotely sensed and other information.
This data set consists of georeferenced digital map data and computerized
attribute data. The map data are in a soil survey area extent format and
include a detailed, field verified inventory of soils and miscellaneous areas
that normally 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 at the mapping scale, but they are large
enough and contrasting enough to significantly influence use and management.
The soil map units are linked to attributes in the National Soil Information
System relational database, which gives the proportionate extent of the
component soils and their properties.
For data quality, attribute accuracy, and process steps, see detailed metadata available from Web Soil Survey.
Metadata for this compilation: http://spatialdata.oregonexplorer.info/geoportal/rest/document?id=%7B6DCF40D8-6B89-4D69-BDD1-EDEC941C4D72%7D
Download ftp://ftp.gis.oregon.gov/geoscience/Soils_framework_data/OGIC_SSURGO_STATSGO_20150309.zip