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 ...

USGS 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.

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 ...

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 ...

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 ...

Mytopo.com has a searchable online database of USGS topographic maps and satellite photos. This slick site lets you search, scroll, zoom in and create custom maps in just a minute or two.

To get more info about the new release, go to the TOPO! Web site. TOPO! Mac is the viewing software you’ll use to access the USGS quad maps from any of the regional TOPO! CD-ROMs currently on sale.

When the USGS decided to pull its map store out of Fairbanks about a decade ago, he said, there was a public hearing, a big public outcry and a USGS decision to give its maps to the Geophysical ...

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 ...

Hawaii News » USGS maps identify lava inundation zones for Mauna Loa Friday, October 27, 2017 01:56 am 1/2 ... By Hawaiian Volcano Observatory Special to West Hawaii Today ...