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, ...

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 ...

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, ...

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 ...

A map displays the likelihood of damaging earthquake shaking in Alaska. USGS. In the last two centuries, 37 states have seen an abundance of magnitude 5 earthquakes, according to the study.