Karl V. Evans (USGS) compiled the geology onto scale-stable base materials At a scale of 1:100,000. Geologic Data Systems,Inc. (GDS), scanned the geologic map and provided attributed Arc/Info .e00 files to the USGS in decimal degree format. Gregory N. Green imported the files, transformed them to UTM zone 11 or zone 12 and Albers Conic Equal Area projections, and checked for errors. The files are stored in Albers Conic Equal Area projection for ease of use across the UTM zone.
This dataset was developed to provide a geologic map GIS database of Salmon National Forest, Idaho, for use in spatial analysis by a variety of users.
Are there legal restrictions on access or use of the data?
Use_Constraints:None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the USGS. Although these data have been used by the USGS and have been successfully imported into database programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. This GIS database is not meant to be used or displayed at any scale other than 1:100,000.
|Geologic units and structural features in format ARCE (version 7.1.2) Size: 2.4