GeMS Wiki

Collaborative Database Effort for Geology

Building a multi-map, multi-user GeMS database

The Alaska Division of Geological & Geophysical Surveys (DGGS) has undertaken the challenge of developing a multi-map, multi-user database model based on the single-map Geologic Map Schema (GeMS) developed by the USGS and state geological surveys. The multi-map model is intended for national use. A multi-map geodatabase will help DGGS meet the future goal of a 1:100,000-scale Alaska compilation, and provide a vehicle for other geologic surveys and agencies to organize and share their own geologic data. DGGS is seeking interested individuals to take part in discussions via teleconferences to provide input on the needs of geologic surveys and other organizations, help develop the specifications of the database model, and share ideas to help the community.

Telecons or Webex will usually be held the 2nd Monday of the month. The next meeting is scheduled for Monday, May 10, 2021, 2pm ET.


  • Introductions and comments
  • Presentations:
    • Jordan Hastings, UC Santa Barbara, will present his GeMS-in-Excel development: proof-of-concept for doing the *entire* construction of a geologic map in Excel, independent of GIS
    • Evan Thoms, USGS will present his thoughts on many-to-many relationships in GeMS
    • Andrew Zaffos, Arizona Geological Survey, will show the pilot version of their GeMS ArcPro toolbar
  • Next meeting date tentatively July 12, 2021! Topic TBA. (Note, DMT'21 June 7-10)

Table of Contents, Alaska Division of Geological & Geophysical Surveys