Historic Aerials
Ariel views of most addresses in the U.S.
dating back to the 50's with interesting overlays.

Historic Map Works
Find old maps and overlay them onto Google maps.

MyTopo
Index of States and towns with an index of
15" quadrangles.

Civil War Traveler
Trail maps of the Civil War.

Maryland Civil War research
Where to find archival maps for Maryland.

USGS Topo maps
How to order.

PBS Civil War maps
Maps of significant battles in the Civil War.

Baltimore County 1877
 Historical atlas of Baltimore County.
Author, Hopkins, G.M.