Digital Geologic Map Techniques Clearinghouse

This site is a prototype clearinghouse for techniques, procedures, documentation, software and macros that support the creation, use and release of digital geologic map datasets. It is hosted by the National Cooperative Geologic Mapping Program, Western Geologic Mapping Team. This site is currently under active construction - please contribute your techniques!

usgs_dmt99.ppt (270KB). Ten Years of Creating, Reviewing and Releasing Geologic Map Databases: Lessons Learned, by Todd Fitzgibbon, presented at the 1999 AASG - USGS Digital Mapping Techniques Workshop.

Here is a partial list of geologic map data models and structures. Not all are documented explicitly as data models - some data models are embedded in application software such as Alacarte and GSMCAD. [Links and more documentation to follow. ttf]

• National Geologic Map Data Model
• GSMCAD and original GSMAP data model
• Alacarte data model
• Simple Digital Geologic Map Data Model (WGMT and others)
• Stewart major-minor code data model (and derivatives)

• Digital Compilation of Geologic Mapping, DRAFT, December 1998.
  Prepared by: L. Sue Beard, Debra Block, Melissa Aldrich, Haydee Hajmpton, and Anita Kaye,
  Western National Cooperative Geologic Mapping Team, Flagstaff, Arizona.
  • digital.pdf (149 KB, 73 pages) PDF format for readability.
  • digital.txt (148 KB) Text format so that AMLs, lookup tables and so on can be cut and pasted into individual files.
• Field systems for geologic mappers, (tfitz@usgs.gov)
• GSMCAD
• Alacarte, (tfitz@usgs.gov and cwent@usgs.gov)

• North Arrow AML - noar-aml.txt (save as noar.aml)
  • Function - plots standard USGS north arrow for declinations between 0 and 90 degrees east
  • Requires - ARC/INFO 7.x including ArcPlot on UNIX or WinNT, lineset geology.lin, shadeset alc1.shd
  • By - Russ Graymer, USGS (rgraymer@usgs.gov)
  • Last update - 4 March 1998
• Arc/Info and ArcView Symbols page
  • Unofficial Arc/Info and ArcView geologic symbols used on the Vermont project
  • Includes links to other sites for Arc/Info and ArcView symbols
  • Maintained by Greg Walsh, USGS (gwalsh@usgs.gov)
• New Digital Cartographic Symbol Standards page

• Review procedures for digital database Open-File publications - digitalrev.txt
  • By - Russ Graymer, USGS (rgraymer@usgs.gov)

• A simple form for the review of geologic map databases in ARC/INFO format (tfitz@usgs.gov):
  • Text format review_form.txt
  • MSWord97 format review_form.doc
  • PDF format review_form.pdf
  • HTML format review_form.html

• Review AML - review.tar -
  • Tar file containing 7 ascii files (4 .aml files, 1 .menu file, 1 help file, and a README file).
  • View the readme file - REVREADME - for instructions on using the Review AML
  • By - Scott Graham, USGS (sgraham@usgs.gov)
  • Last update - 29 August 2000.

• Web Page Template - web_template.htm -
  • Web page template in ascii format for publication of digital open-files on wrgis
  • Last update - 29 January 1999.

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