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USGS Geological Survey
Geologic Investigations Series I-1109
Digital database, version 2.0

Spatial Digital Database for the Tectonic Map of Southeast Arizona

Map by Harald Drewes1

Digital database by Robert A. Fields2, Douglas M. Hirschberg3, and Karen S. Bolm2


(Map originally published in 1980)

Database approved for publication April 19, 2002

1 U.S. Geological Survey
2 U.S. Geological Survey, 520 N. Park Ave., Tucson, Arizona 85719
3 University of Arizona, 520 N. Park Ave., Tucson, Arizona 85719

A spatial database was created for Drewes' (1980) tectonic map of southeast Arizona: this database supercedes Drewes and others (2001, ver. 1.0). Staff and a contractor at the U.S. Geological Survey in Tucson, Arizona completed an interim digital geologic map database for the east part of the map in 2001, made revisions to the previously released digital data for the west part of the map (Drewes and others, 2001, ver. 1.0), merged data files for the east and west parts, and added additional data not previously captured. Digital base map data files (such as topography, roads, towns, rivers and lakes) are not included: they may be obtained from a variety of commercial and government sources.

This digital geospatial database is one of many being created by the U.S. Geological Survey as an ongoing effort to provide geologic information in a geographic information system (GIS) for use in spatial analysis. The resulting digital geologic map database can be queried in many ways to produce a variety of geologic maps and derivative products. Because Drewes' (1980) map sheets include additional text and graphics that were not included in this report, scanned images of his maps (i1109_e.jpg, i1109_w.jpg) are included as a courtesy to the reader (in data package linked below). This database should not be used or displayed at any scale larger than 1:125,000 (for example, 1:100,000 or 1:24,000). The digital geologic map plot files (i1109_e.pdf and i1109_w.pdf) that are provided herein are representations of the database (see Appendix A).

The map area is located in southeastern Arizona (fig. 1). This report describes the map units (from Drewes, 1980), the methods used to convert the geologic map data into a digital format, the ArcInfo GIS file structures and relationships, and explains how to download the digital files from the U.S. Geological Survey public access World Wide Web site on the Internet. The manuscript and digital data review by Helen Kayser (Information Systems Support, Inc.) is greatly appreciated.

 description of files available to download

 file size

 README file, in UNIX ASCII format, listing all files available for download

README file, In DOS ASCII, listing all files available for download

4 KB

4 KB

I-1109 in Portable Document Format (PDF)

Get Adobe Reader to view pdf files

789 KB

 Complete digital data package

Utilities to extract TAR and GZIP files on your Windows or Macintosh

142 MB

 Metadata file (ASCII text file)

9 KB 

 Digital map sheet, east half in .pdf format

Digital map sheet, west half in .pdf format

Map scale: 1:250,000
Page size: 28 inches by 28 inches

16 MB


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For questions about the database for this report, contact Doug Hirschberg

This report is only available on the web


Maintained by: Mike Diggles
Created: June 11, 2001
Last modified: February 27, 2007 (mfd)

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