Invitation to 125 Years of USGS Topographic Mapping Celebration

On December 3, 2009, more than 300 people gathered at the U.S. Geological Survey (USGS) headquarters in Reston, Virginia, to celebrate the 125th anniversary of USGS topographic mapping. Presentations featured discussions of the benefits of topographic maps, the history of USGS topographic mapping, the announcement of a new USGS digital topographic map and a new method for viewing and accessing topographic information via the Internet, and advice on future directions