Fred Fisher, Dave McIntyre and Kate Johnson (all USGS) compiled the geology onto stable-base material at a 1:250,000. That version was published as USGS publication MAP I-1819. TechniGraphic System, Inc. of Fort Collins Colorado digitized that map for the USGS in 1999 under contract for N.Shock (USGS). G.Green (USGS) edited and prepared for digital release the Challis digital version as a geographic information system database. The digital geologic map database can be queried in many ways to produce a variety of geologic maps. The files are stored in the following projection - UTM, meters, zone 11, NAD27, Clarke 1866.
This dataset was developed to provide a geologic map GIS database of Challis 1°x2° Quadrangle, Idaho for use in spatial analysis.
Are there legal restrictions on access or use of the data?
Use_Constraints:This database is not meant to be used or displayed at any scale other than 1:250,000.
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey (USGS) editorial standard nor with the North American stratigraphic codes. 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 data base 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 data base GIS is not meant to be used or displayed at any scale other than 1:250,000.
|Geologic units and structural features in format ArcInfo interchange (version 7.1.2) Size: 10