Welcome to the National Geologic Map Database web portal! The national project (the NGMDB) will demonstrate a system model in which the full richness and variability of map information content is managed by the publishing agencies or other repositories, with a subset of the information made available via the national NGMDB data portal for browsing and querying and, on a limited basis, for downloading.
Click on the map map to enter the portal, and we hope you enjoy the results!