Introduction
The 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.
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First posted November 19, 1999
- Map files TAR.Z (1.97 MB)
HPGL2 and ARC/Info graphics format as an UNIX compressed (and, in some cases, TAR) file. Map scale: 1:100,000. Page size: 29 inches by 39 inches
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