Useful links for appraisers:

International Office:

Appraisal Institute.org - The head office of the international membership association of professional real estate appraisers.

Statistics

U.S. Census Bureau - Population, business, and geography statistics and more.
US Department of Labor - Labor Statistics - Get the latest statistics on consumer spending, productivity and employment.
California Environmental Resources Evaluation System (CERES)- Economic and demographic information for Kern County.

Mapping

MapQuest
MapBlast
MapsOnUs
Yahoo! Maps

Aerial Photos and Topo-maps - World wide photos from MSN.

California Office of Real Estate Appraisers - California laws, regulations, liscence requirements, etc..

California Department of Real Estate - California real estate law, regualations, and publications

Marshall & Swift - Provider of building cost and other data to the appraisal industry.

US Department of Housing and Urban Development (HUD) - The federal agency responsible for addressing America's housing needs.