The Digital Geologic Map of Colorado in ARC/INFO Format

This dataset consists of a digital geologic map for the state of Colorado.
This geologic map was prepared as a part of a study of digital methods and
techniques as applied to complex geologic maps. The geologic map was digitized
from the original scribe sheets used to prepare the published Geologic Map of
Colorado (Tweto 1979). Consequently the digital version is at 1:500,000 scale
using the Lambert Conformal Conic map projection parameters of the state base
map. Stable base contact prints of the scribe sheets were scanned on a
Tektronix 4991 digital scanner. The scanner automatically converts the scanned
image to an ASCII vector format. These vectors were transferred to a VAX
minicomputer, where they were then loaded into ARC/INFO. Each vector and
polygon was given attributes derived from the original 1979 geologic map.
To rebuild the database, copy the contents of the following
directory to your Arc/Info platform:

http://geo-nsdi.er.usgs.gov/metadata/open-file/92-507/metadata.html

and then run the AML "LOAD.AML".