Geologic Map and Digital Database of the Cougar Buttes 7.5' Quadrangle, San Bernardino County, California

This data set maps and describes the geology of the Cougar Buttes 7.5'
quadrangle, San Bernardino County, California. Created using
Environmental Systems Research Institute's ARC/INFO software, the data
base consists of the following items: (1) a map coverage showing
geologic contacts and units, (2) a separate coverage layer showing
structural data, (3) a scanned topographic base at a scale of 1:24,000,
and (4) attribute tables for geologic units (polygons), contacts (arcs),
and site-specific data (points). The data base is accompanied by a
readme file and this metadata file. In addition, the data set includes
the following graphic and text products: (1) A portable document file
(.pdf) containing a browse-graphic of the geologic map on a 1:24,000
topographic base. The map is accompanied by a marginal explanation
consisting of a Description of Map Units (DMU), a Correlation of Map
Units (CMU), and a key to point and line symbols. (2) Separate .pdf
files of the DMU and CMU, individually. (3) A PostScript graphic
plot-file containing the geologic map on a 1:24,000 topographic base
accompanied by the marginal explanation. (4) A pamphlet that summarizes
the late Cenozoic geology of the Cougar Buttes quadrangle.
The geologic map data base contains original U.S. Geological Survey data
generated by detailed field observation and by interpretation of aerial
photographs, including low-altitude color and black-and-white
photographs and high-altitude infrared photographs. The map was created
by transferring lines from the aerial photographs to a 1:24,000
topographic base via a mylar orthophoto-quadrangle or by using a PG-2
plotter. The map was then scribed, scanned, and imported into ARC/INFO,
where the database was built. Within the database, geologic contacts
are represented as lines (arcs), geologic units as polygons, and
site-specific data as points. Polygon, arc, and point attribute tables
(.pat, .aat, and .pat, respectively) uniquely identify each geologic
datum and link it to other tables (.rel) that provide more detailed
geologic information.