Spatial Digital Database for the Geologic Map of Nevada

This report publishes a geologic digital spatial database (nvgeo) representing
the geologic map of Nevada (Stewart and Carlson, 1978a). The original paper
map was printed as a single sheet at a scale of 1:500,000, then reprinted as
two sheets in 1991. The database provided by this open-file report supercedes
earlier published digital versions (Turner and Bawiec, 1991, 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).

The digital geologic map of Nevada consists of a single spatial database
(nvgeo) which contains map units and lines. The feature attribute tables
include a geologic linework table, NVGEO.AAT, that relates to the NVGEO.CON
(contacts and boundaries), NVGEO.ST2 (structures), and NVGEO.REF (source
reference) files, and a rock unit table, NVGEO.PAT, that relates to the
NVGEO.RU (rock unit) and NVGEO.REF (source reference) files.

[Summary provided by the USGS.]