4Nisha V,Gad SS,Selvapandian D,et al.Geographical information system(GIS)in investigation of an outbreak[J].J Commun Dis,2005.37(1):39-43.
5Bavia ME,Hale LF,Malone JB,et al.Geographic information systems and the environmental risk of schistosomiasis in Bahia,Brazil[J].Am J Trop Med Hys,1999,60(4),566-572.
7Sonnentag O.Understanding environmental complexity through integratlon of geographical information systems and process-oriented models:an enhanced tool or a fallacy?[J].Hydrological Processes.2006,20(5):1239-1244.
4Aronoff S.Geographic Information systems:A management perspective,Ottawa:WDL Publications,1989.
5Briggs DJ,Elliott P.The use of geographic information systems in studies on environment and health.WId HIth Statist Quart,1995,48:85～94.
6Clarke KC,McLafferty SL,Tempalski BJ.On epidemiology and geographic information systems:a review and discussion of future directions.Emerging infect Dis,1996,2:85 ～ 92.
