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Open-File Report 99-438

Prepared in cooperation with the Idaho Geological Survey

Digital Geologic Map of Part of the Thompson Falls 1:100,000 Quadrangle, Idaho

By Reed S. Lewis and Pamela D. Derkey

Thumbnail of and link to report PDF (744 kB)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.

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

For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
345 Middlefield Road, MS 901
Menlo Park, CA 94025-3591

Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader. PDF documents opened from your browser may not display or print as intended. Download the latest version of Adobe Reader, free of charge.

Suggested citation:

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.,

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