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[2]Goldberg,Daniel W. 2008."A geocoding best practices guide."Technical report,GIS Research Laboratory,University of Southern California.http：//www.naaccr.org/filesystem/pdf/Geocoding_Best_Practices.pdf.

[3]Goldberg,D. W.，and J.P.Wilson.2008.USC WebGIS Services.https：//webgis.usc.edu.Last accessed December 2008.

[4]McKinley,Jesse."From housing to haven to foreclosure leader."New York Times. August 13，2007.

[5]Wood,Simon. 2006.Generalized Additive Models:An Introduction with R.Boca Raton,FL:Chapman＆Hall/CRC.