Based Gis In Urban Construction Land Ecological Suitability Evaluation

Along with our country modernization and the urbanized advancement, the urban population increases rapidly, develops with expands day after day using the scope, town construction's quantity and the scale also grow day by day,the construction land scale expands rapidly.Because lacks the science reasonable proof, in many place's construction land developments has, the disorderly condition blindly, on the one hand creates the ecological environment the worsening, on the other hand to constructs the land the continually use to lay down the hidden danger.. Therefore, only then understood fully the construction land the suitability, can carry on the reasonable use and the development to the construction land.The town construction land suitability is refers to the land and their integrant part to the town construction use suitable degree. The cities land's reasonable use, thought generally is carries on the use to the land according to the town planning stipulation use, causes the land income maximization. If want to reasonable use urban land, must establish the urban land appraisal the scientific system, take the ecology first as the premise, carries on the evaluation for the suitability use to the land . GIS is one kind of large-scale computer information system, can gather,simulation,processing,retrieval,analysis and expression geography spatial data, is can satisfy the urban constructive land suitability evaluation from each aspect the demand.Base on analysis and summarizes the theories about urban constructive land suitability evaluation , This article discusses the method of urban constructive land ecologic suitability evaluation supported with GIS. This article is composed of seven chapters:The first part, elaborated the research background, the goal and the significance, the domestic and foreign related research development tendency, the research primary coverage and the technical route briefly.The second part, discuss the theory about urban constructive land ecologic suitability evaluation, including their related concept and fundamental research. The third part, elaborates the GIS technology and the urban land suitability assessment method relations, from provides the technical support using the platform in for the evaluation model, and exposition the basic method of urban constructive land ecologic suitability evaluation based on GIS.The fourth part, studies on the urban constructive land ecologic suitability evaluation's procedure and model, discusses indicator system's establishment and the appraisal factor weight determination.The fifth part, conducts the empirical study take above theory as the foundation, take the Guangxi Sanjiang county as the example, in the GIS software service platform, carries on the evaluation based on the appraisal flow to Sanjiang construction land ecologic suitability, and give the pointed proposal. from sustainable use's way.The sixth part, summarizes the main point about the method method of urban constructive land ecologic suitability evaluation based on GIS.