Beginning in the 1940s, the U.S. Geological Survey’s National Mapping Program was tasked with the immense cartographical feat of surveying the entire country to create a series of more than 50,000 ...

No audio available for this content. This graphic represents the planned US Topo map production schedule for the next three- year revision cycle. The US Topo project repackages data from national GIS ...

The USGS US Topo map program has entered its third, three-year cycle of revising and updating the digital US Topo maps. To start this new cycle, the USGS National Geospatial Program is excited to ...

Maps help us find, discover, and reach new places. Although the field of geography is focused on locations, it is also a ...

For outdoor lovers, no map is more iconic – or useful – than a USGS topo map. While the concentric, sepia lassos of elevation are the maps’ visual signature, their real power is the cross-referenced ...