database

Interactive database for geologic maps of the United States

The U.S. Geological Survey hosts the National Geologic Map Database (NGMDB). This interactive tool serves as a national archive for high-quality, standardized geologic maps created by the U.S. Geological Survey and state geological surveys.

The MapView section of the NGMDB displays geologic maps from across the country dating back to 1879. The database is searchable by address, and results can be narrowed further using scale and date filters.

Interactive database for topographic maps of the United States

The U.S. Geological Survey hosts topoView, an interactive database of the survey’s topographic maps.

The map is searchable by address, and clicking on any point on the map brings up topographic maps of the area dating back to 1879. Map results can be narrowed further using scale and date filters.

Clicking the “show” option will overlay the selected map onto the coordinates of topoView’s base map. Adjusting the map overlay transparency allows comparison of historical and present-day topography.

All maps in topoView are downloadable in multiple formats.

New Database Enhances Access to Geological Survey Publications

Lava erupting from fissures at Bárðarbunga Volcano, Iceland. Image Credit: Peter Hartree, CC BY-SA 2.0, Bárðarbunga Volcano, September 4 2014

The American Geosciences Institute (AGI) has launched a new online resource, the Geological Surveys Database, to support the public discovery of a critical source of reliable geoscience information. This new database provides a state-of-the-art portal for decision makers and others to search and discover state geological survey publications and U.S. Geological Survey factsheets.

Geological Surveys Database

Day Pass Activation

To activate your GeoRef Specialty Database Day Pass, please enter your day-pass code, email address, a password, and your country of residence. Once you activate your day pass, you will be directed to login to the system using the email address and password you provided. The Day Pass will allow you full access to the system for 24 hours.

If you have previously used a day pass, please complete this form - it will reuse your account and update your password.

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