The USGS National Map web page provides free access to all sorts of historical topographic map information. These maps often have place names lost to time, old cemeteries, and old buildings.
Volunteers can now contribute data for all 50 states. You do not need to live in available states to participate.
Structures that should be mapped include CEMETERIES, schools, hospitals, post offices, police stations and other important public places. The data currently being collected by volunteers become part of TNM Structures dataset which is made available to users free of charge.
I would suggest that genealogists would like to contribute cemetery locations to this public database. Your contribution will help future genealogists find the cemeteries you list.
The U.S. Geological Survey (USGS) National Geospatial Program (NGP) sponsored various forms of volunteer map data collection projects over the past two decades. Citizen cartographers revised many maps during this period, but the program was suspended in 2008. Thanks to the increase in low-cost technology, especially GPS receivers and widespread use of the Internet, the USGS has now revitalized its volunteer program. The USGS has launched a pilot project to once again encourage crowdsourcing (citizen participation).
For more information about the project and how to participate, go to The National Map Corps web site at https://my.usgs.gov/confluence/display/nationalmapcorps/Home.
You can read more about the National Map Corps at http://www.usgs.gov/newsroom/article.asp?ID=3596&from=rss.