The U.S. Geological Survey is scanning 250,000 of its historic maps to put online. The U.S. Geological Survey (USGS) is nearly halfway through its release of more than 250,000 historical topographic ...

USGS released its most detailed national geologic map, offering layered views of geology beneath the Earth’s surface across the lower 48 states. The Cooperative National Geologic Map integrates data ...

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“We’re trying to make the maps look and feel like the old topo maps you could hold in your hand,” USGS Montana geospatial liason Lance Clampitt said from Bozeman. “We’ve gone from producing hard-copy ...