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  1. 2 days ago · GeMS is intended to provide a stepping stone toward development of multimap databases, in particular the National Geologic Map Database (NGMDB). Please visit our GeMS site. Related, Older Database Designs. This list focuses on the work by USGS and AASG staff, ca. 1998-2010, to define conceptual data models and physical implementations, mostly ...

  2. 6 days ago · National Geologic Map Database. Since the late 1800's, the U.S. Geological Survey has been responsible for maintaining a lexicon of geologic names for the Nation. The published lexicons (see below) include brief definitions for each unit (e.g., the lithology, thickness, age, underlying and overlying formations, and type locality).

  3. ngmdb.usgs.gov › Info › standardsNGMDB | GeMS - USGS

    1 day ago · National Geologic Map Database"GeMS" — Geologic Map Schema. In 2014-2017, this database design was extensively reviewed and test-implemented by the U.S. Geological Survey and the State Geological Surveys. During this process, certain modifications and clarifications were made to the now-superceded version, NCGMP09v1.1.

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  5. 5 days ago · Map of real-time streamflow compared to historical streamflow for the day of the year. Saturday, May 25, 2024 08:30 EDT. Home; ... U.S. Geological Survey

  6. 3 days ago · Quick Tips for using this 1900 Historical Michigan Counties Map tool. There are four ways to get started using this Historical U.S. Counties map tool. Type any PRESENT-day place or address in the “Search places” box above the map and choose the one you want from the auto-complete list. Click the map to see the historical county name for ...

  7. 5 days ago · View Kent County, Michigan Township Lines on Google Maps, find township by address and check if an address is in town limits. See a Google Map with township boundaries and find township by address with this free, interactive map tool. Optionally also show township labels, U.S. city limits and county lines on the map.

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