Land Suitability Research Based on GIS: Case from Hangzhou, China

Land suitability is the base of land use planning and decision, especially in urban region. Current research is limited in suitability of single land use type or evaluation of unidirectional factorspsila influences, such as factors of geology environment, location & economic, or geochemistry, etc.. This article focuses on Hangzhou urban area land use suitability evaluation, in which construction land suitability and agro-land suitability are considered comprehensively, math models and GIS technology have been utilized. Applications and analysis of the weakness and superiority of models such as K-mean cluster, fuzzy comprehensive evaluation, BP neural net, have been studied during evaluation. The land use and urban expansion decisions are made upon the comprehensive evaluation of multi-land-utility and upon the least cost of high-quality ecological resources. GIS application and different math models for land suitability evaluation have been studied and application of land suitability evaluation conclusion on urban expansion planning has been discussed deeply in Hangzhou case.