1994. Schruben, Arndt, and Bawiec. This dataset is a digital representation of the King and Beikman map. In 1974 the U.S. Geological Survey published a new Geologic Map of the United...
1994. U.S. Department of Agriculture, Natural Resources Conservation Service. This data set is a digital general soil association map developed by the National Cooperative Soil Survey. It consists of a broad based inventory o...
2006. U.S. Department of Agriculture, Natural Resources Conservation Service. STATSGO2 consists of general soil association units. It was developed by the National Cooperative Soil Survey and supersedes the State Soil Geograp...