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Theory and Application of Evaluation on Ecological Applicability for Urban Construction Land Based on GIS

WANG Hai-ying,ZHANG Xin-chang,KANG Ting-jun(Institute of Geography Science and Planning,Sun Yat-Sen University,Guangzhou 510275,China)  
With the implementation of the strategy for sustainable development in China's modernization,how to plan,develop and utilize the resources rationally,protect urban ecological environment with scientific and effective methods,and realize the rapid and healthy and sustainable development,has become a major issue increasingly concerned by people.In this paper,with RS and GIS as the technology support,Delphi-method was used to determine influential factors about ecological suitability in urban construction land,such as natural,social,economic and ecological safety factors etc.And the analytic hierarchy process(AHP) was used to calculate the weights of the related influential factors.Keeping the priority of the ecological conservation principle,a set of system and evaluation model for evaluation on ecological applicability of urban construction land were established.Using this model system and methods to define the ecological control area can provide important opinions about rational arrangement of urban land use.
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