The University of California Berkeley's Earth Science's and Map Library has produced a Website that highlights historical maps of the San Francisco Bay area from 1895 to the present. The maps, produced by the US Geological Survey, are scanned topographic 7.5 and 15-minute quadrangles and can be zoomed to impressively fine detail. The site allows visitors to choose from the quadrangle index, search...

Topographic map users will be excited about this easy-to-use, interactive format for accessing topographic maps for the entire US (excepting Alaska and Puerto Rico, which should be available soon). In collaboration with the US Geological Survey (USGS), this site holds "every USGS 1:100,000, 1:25,000, and 1:24,000 scale map for the entire United States." Maps are searchable by place names as well...