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Spatial Digital Database for the Geologic Map of Oregon: Open-File Report 2003-67
United U. S. Department of the Interior
(Author)
·
George W. Walker
(Author)
·
Bibliogov
· Paperback
Spatial Digital Database for the Geologic Map of Oregon: Open-File Report 2003-67 - Walker, George W. ; U. S. Department of the Interior, United ; Et Al
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Synopsis "Spatial Digital Database for the Geologic Map of Oregon: Open-File Report 2003-67"
Introduction This report describes and makes available a geologic digital spatial database (orgeo) representing the geologic map of Oregon (Walker and MacLeod, 1991). The original paper publication was printed as a single map sheet at a scale of 1:500,000, accompanied by a second sheet containing map unit descriptions and ancillary data. A digital version of the Walker and MacLeod (1991) map was included in Raines and others (1996). The dataset provided by this open-file report supersedes the earlier published digital version (Raines and others, 1996). This digital spatial database is one of many being created by the U.S. Geological Survey as an ongoing effort to provide geologic information for use in spatial analysis in a geographic information system (GIS). This database can be queried in many ways to produce a variety of geologic maps. This database is not meant to be used or displayed at any scale larger than 1:500,000 (for example, 1:100,000). This report describes the methods used to convert the geologic map data into a digital format, describes the ArcInfo 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. Scanned images of the printed map (Walker and MacLeod, 1991), their correlation of map units, and their explanation of map symbols are also available for download.
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The book is written in English.
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