Spatial Digital Database for the Geologic Map of Oregon

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 supercedes 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).

[Summary provided by the USGS.]