December 2006, a new Internet-based method for submitting information on structures was introduced. Using a web browser, volunteers are able to navigate maps and aerial photography, placing a point on the map and subsequently entering the name and type of structure. From August 2008, the program stopped accepting structure data collected via GPS, but continued to use the web-based collection site. Types of structures mapped The following is a list of structures that can be entered on the web site. The focus is significant man-made structures. The "other" category is for man-made structures not on this list and should not include locations such as homes, restaurants or other commercial establishments. Education School College/University Emergency Response and Law Enforcement Fire Station/EMS Station Law Enforcement Hospital Ambulance Service Correctional Facility Government and Military State Capitol Mail and Shipping Post Office Public Attractions and Landmark Buildings Cemetery See also Microsoft Research Maps (formerly TerraServer-USA) National Elevation Dataset References External links The National Map (USGS) National Geospatial Program (USGS) USGS Topographic Map Revision USGS Aerial Products Geospatial Modernization Blueprint from the U.S. Department of the Interior GeoSPARQL webapp for selected data sets United States Geological Survey Topography Maps of the United States Collaborative mapping Aerial photography