National Cooperative Soil Survey field mapping methods and standards were used to produce the soils maps that were digitized for the Soil Survey Geographic (SSURGO) database. SSURGO datasets represent the most detailed level of mapping done by the Natural Resources Conservation Service (NRCS). The mapping scale is typically 1:24000 and the digitizing is done by line segment (vector) format from orthophotoquads. SSURGO spatial data is linked to a tabular relational Map Unit Interpretation Record (MUIR) database that contains soil property and soil interpretation information. SSURGO datasets are available in modified digital line graph (DLG-3) optional format and in Arc Interchange formats. The MUIR tabular datasets and accompanying metadata sets are available as tab delimited ASCII file formats and text files.