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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.

Sign up now for Appalachian Geoscience GeoCamp!

A geologist taking measurements of an outcrop to create a geologic map
The United States Geological Survey and the West Virginia Geological & Economic Survey have teamed up with West Virginia University to initiate the Appalachian Geoscience GeoCamp this summer. Students will explore concepts and skills related to the earth sciences, including orienteering, topographic and geologic mapping, forest ecology and more. The GeoCamp experience will go far beyond indoor lessons and lectures by putting learning into the field alongside experts, to create hands-on experiences that allow students to explore possible future interests and careers. 
 

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