USGS - science for a changing world

San Francisco Bay Area Regional Database (BARD)

Historic 30-Min Maps

The USGS 30-minute map series features the earliest USGS topographic maps. The four maps shown have dates of 1892, 1894, or 1902. Just select a highlighted quadrangle. This takes you to the map download page where thumbnails of each map available are shown for download.

The 30-minute map series at a scale of 1:125,000 (1 inch = approximately 2 miles) has been abandoned. The USGS 7.5-minute topographic quadrangle map series is the official USGS quadrangle series. To obtain 7.5-minute topographic quadrangles visit the USGS Store.

Historic 30 Minute Map Index

Map of 30 minute DEMs Napa Sacramento Lodi Santa Cruz

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Page Last Modified: Wednesday, 07-Dec-2016 11:56:18 EST