Open-File Report 99-438
IntroductionThe geology of the Thompson Falls 1:100,000 quadrangle, Idaho was compiled by Reed S. Lewis in 1997 onto a 1:100,000-scale greenline mylar of the topographic base map for input into a geographic information system (GIS). The resulting digital geologic map GIS can be queried in many ways to produce a variety of geologic maps. Digital base map data files (topography, roads, towns, rivers and lakes, etc.) are not included: they may be obtained from a variety of commercial and government sources. This database is not meant to be used or displayed at any scale larger than 1:100,000 (e.g., 1:62,500 or 1:24,000). The map area is located in north Idaho. This open-file report describes the geologic map units, the methods used to convert the geologic map data into a digital format, the Arc/Info GIS file structures and relationships, and explains how to download the digital files from the U.S. Geological Survey public access World Wide Web site on the Internet. |
First posted November 19, 1999
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Lewis, R. S., Derkey, P. D., 1999, Digital Geologic Map of Part of the Thompson Falls 1:100,000 Quadrangle, Idaho: U. S. Geological Survey Open-File Report 99-438, 32 pp., https://pubs.usgs.gov/of/1999/0438/.