thumbnail

Lithology and aggregate quality attributes for the digital geologic map of Colorado

Open-File Report 99-29

By:
, , and

Links

Abstract

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.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Lithology and aggregate quality attributes for the digital geologic map of Colorado
Series title:
Open-File Report
Series number:
99-29
Edition:
-
Year Published:
1999
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
1 computer optical disc :col. ;4 3/4 in.