Roles Of Remote Sensing And GIS Technology On Urban Land Master Plan--As City Changde For Example

The land of a city is the base of the development of city's society and economy.The quantity quality and distribution of a city's land source affect the economy society circumstance and synthetical benefit of the city.At present,in our country,the utilize rate of city's land resource is low and the structure of urban land use is not reasonable.The main reason of these is that there are not scientific and reasonable layout.In this paper,the technology of Remote sensing and GIS is used to this subject and the master plan of city Changde is taken as a case study to discuss some key æ™…echniques in this process .Techniques for data fusion in multisources remotely sensed imagery are reviewed.Representation of information,framework,algorithms,control and applications of fusion are included.ETM remotely sensed imagery and large-scale relief map are fused together to make full use of effective information of remote sensing data and other data. A GIS-aided urban-environmental spatial database about the status quo of urban land use and environment is established according to the result of remete sensing survey. According to the characteristic of urban land use, applying a multi-objective method of appraisal,this paper analyses and appraises the land suitability for urban land use in city Changde. It focuses itsdiscussion on the selection of the chief elements and factors and shows how a multi-objective land suitability appraisal is achieved via the introduction of the application of Analytic Exponent Process and a combined analysis of spatial analytic functions,graphes and properties in the geographical information system.It analyzes the assessment of the coordination between various urban land uses and urban environmental potential.then establishes the evaluation model for different urban land uses and urban environment potential for each urban land uses category is evaluated.At last,on the base of these analyse and assessment, optimizing the structure of urban land use and putting forward scientific and reasonable lay out project.The analytical results indicate that the combination of remote sensing with GIS technology can be applied to the fast and accurate survey and assessment of urban land use, reasonable lay out ,and optimizing the structure of urban land use.