The United States Geological Survey (USGS) continues to support the delivery of its digital maps through Avenza Systems Inc.‘s PDF Maps app. It has widened the selection to more than 120,000 US Topo ...

With the release of new US Topo maps for Illinois and South Dakota, t he USGS has completed the second, three-year cycle of revising and updating electronic US Topo quadrangles. Since the project’s ...

To be sure, printed maps from the USGS still come with a fee. But a download of the agency’s cartographical creations, which open in Adobe Acrobat as PDF files, is as simple and free as a few ...

USGS topo maps have been available digitally since 2008, but until now the lack of complete mobile support has handicapped the collection. Just in time for mosquito season, Trimble Outdoors has ...

Yes, you could get USGS topographic maps before, ... Quads, or quadrangles, generally refer to USGS maps that cover 7.5 arc minutes (one minute of arc is equal to one-sixtieth of a degree).

Those giant maps gathering dust in the corner of your favorite outdoor store have finally been brought into the 21st century. National Geographic‘s new service, launched last week on their Maps site, ...

It just got way, way easier to search and browse the US Geological Survey’s collection of historical topographic maps, thanks to a new online map viewer.These maps—more than 178,000 of them ...

The U.S. Geological Survey is using TerraGo Technologies' GeoPDF format to make its primary base series quadrangle maps available online. The U.S. Geological Survey is using TerraGo Technologies' ...