This month the U.S. Geological Survey (USGS) rolled out topoView 2.1, a modern web application built on an open source mapping platform that lets users discover, interact, and download historical USGS ...

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 ...

A map of Chicago, Illinois, imprinted in 1913 from the United States Geographical Survey’s historical topographic map collection. Image courtesy of the USGS Map lovers, rejoice! The United States ...

I've only seen some limited efforts on the local level in the past. The city of Seattle has been collecting landslide data since 1890, so they have a wonderful data bank of historical land-movement ...

The potential for catastrophic earthquakes to rock nearly every corner of the United States is becoming a growing threat, according to the U.S. Geological Survey. By analyzing the newest seismic ...