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—date back ...

The U.S. Geological Survey is scanning 250,000 of its historic maps to put online. The U.S. Geological Survey (USGS) is nearly halfway through its release of more than 250,000 historical topographic ...

We have in the past looked at a lot of content provided by the USGS. The USGS is the provider of the data for the ‘earthquakes layer’ in Google Earth. We also looked at some of their future plans, ...

The United States Geological Survey has nearly completed its project to digitize over 200,000 topographical maps and create a free, searchable online archive The United States Geological Survey has ...

This screen shot shows a web app from esri that allows users to over-lay historic maps. The map above shows Harrisburg in the 1970s and the Harrisburg area at the turn of the 20th century. Who doesn't ...

The Brinkerhoff Geology Library supports students, faculty, and researchers with a focused collection of geological literature, maps, and data resources. It provides a quiet study environment and ...

During the latter half of the twentieth century, the backbone of the U.S. Geological Survey’s national mapping effort was the 7.5-minute topographic quadrangle. These detailed printed maps defined ...

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 ...