Aerial Photographs - DOQQs

• http://casil.ucdavis.edu/casil/usgs.gov/doqq-archive/
• Also see US Dept of Agriculture GIS or U.S. Fish and Wildlife Service for data.  If you know other links, please contact me.

Topographic Maps - DRGs  (to find the topo name go to USGS Store Search Page)

• http://drg.casil.ucdavis.edu/7.5_minute_series/ - Gives you a FTP site with the topos by name
• http://drg.casil.ucdavis.edu/- the main page that I got the above link from
• http://www.reo.gov/reo/data/data.htm - Northern CA - Topographic maps, DEM, and misc GIS data
• Also check these 3 sites that have data for the entire USA USDA GIS, DataDepot, and USFWS GIS.

Geologic Maps - GQs

Digital Elev. Model - DEMs

• http://www.reo.gov/reo/data/data.htm - Northern CA - Topographic maps, DEM, and misc GIS data

Misc California GIS Links

• http://www.reo.gov/reo/data/data.htm - Northern CA - Topographic maps, DEM, and misc GIS data
• http://www.gis.ca.gov/index.epl - Misc. GIS info.
• http://nkca.ucla.edu/Master.cfm?Content=Map
• http://bard.wr.usgs.gov/index.html - San Francisco Bay Area Regional Database (BARD).  Has topos and aerial photographs.
• http://blt.wr.usgs.gov/ - Lake Tahoe Data Clearinghouse

Misc and General GIS Links - Make sure you check this page.  I have links to places for all of the USA for GIS data.