Using scanned maps and data from the United States Geological Survey (USGS), Esri developed an interactive tool to explore topographic maps of the US.

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). Basically each quad covers an area between 49 and 70 square ...

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, ...

Digital US Topo maps are designed to look, feel, and perform like the traditional paper topographic maps for which the USGS is so well known. However, in contrast to paper-based maps, ...

WASHINGTON DC — Hikers, hunters and other outdoor recreationists will be pleased to know that free digital topographic maps are now available online from the U.S. Geological Survey.Here's the ...

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 ...

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 DeLorme Topo USA vector maps begin with the small-scale 1:100,000 USGS metric topography map. While the 7.5 minute quad (Illustration 1) depicts a through trail, the small scale 1-to-100 shows ...

On USGS quadrangle maps from 1947-1992, oil wells are marked by hollow black circles. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert ...

The United States Geological Survey (USGS) recently posted online two moon maps — a photo mosaic and a topographic map — that were constructed using images and data captured by NASA's long ...

The first batch of new, more accurate Alaska maps that will eventually cover the whole state is out and free to the public as part of a state and federal project to replace old topographic maps ...