IMPROVING ACCESS TO GEOSCIENCE INFORMATION -- THE REDESIGNED NATIONAL GEOLOGIC MAP DATABASE
Online resources provided by, or linked from, the NGMDB include:
1) Cartographic, database design, science terminology, and data-exchange standards,
2) The U.S. Geologic Names Lexicon (GEOLEX), a standard reference for the Nation's stratigraphic nomenclature,
3) The Geoscience Map Catalog (containing citations and links to >96,000 maps, stratigraphic charts, and reports by >630 publishers, many containing GIS data and map images, and
4) Proceedings from the eighteen annual Digital Mapping Techniques workshops, which document map-preparation techniques and standards in use or in development by the Nation's geological surveys.
In recent years, a major redesign of the NGMDB’s database and website was undertaken. Two new features were added to the redesigned site: (1) “mapView”, which provides a mosaicked view of geologic maps as a new front-end to the NGMDB's Map Catalog, and (2) topoView, which enables users to quickly search and browse the USGS Historical Topographic Map Collection.