![]() ![]() Geologic mapping and topographic mapping at the USGS have a long tradition together (see 1888 report). This interface was created by the National Geologic Map Database project (NGMDB), in support of topographic mapping program managed by the National Geospatial Program (NGP). This can be particularly useful for historical purposes, such as finding the names of natural and cultural features that have changed over time. TopoView shows the many and varied topographic maps of each of these areas through history. As the years passed, the USGS produced new map versions of each area. This mapping was done at different levels of detail, to support various land use and other purposes. In 1879, the USGS began to map the Nation's topography. TopoView highlights one of the USGS's most important and useful products, the topographic map. Accessing USGS topographic maps has never been easier ![]()
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