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Land Suitability Evaluation in the secondary use of geographic information systems , the gradual development of changes from the previous a single suitability assessment system has become a multidisciplinary cross-cutting evaluation system . Gradually refined by a single land ecological suitability Suitability evaluation of agricultural land suitability assessment, forestry land , construction land suitability evaluation . Based on the natural environment , Jianyang City , the characteristics of the socio-economic conditions , reference to the the Jianyang City ecological suitability factor evaluation index selection principle , combined with land ecological suitability definition , ecological suitability of the land for construction of Jianyang City Environmental Quality Evaluation System . Evaluation system that contains the target layer , constrained layer , and the index layer , and select the slope, aspect , elevation , geological formations , vegetation cover , annual precipitation , river systems , population density , traffic conditions and other natural and social factors as evaluation factors for the establishment of Jianyang City construction land suitability evaluation system . After the evaluation system is established , using the analytic hierarchy process and Graphic Overlay Method Jianyang city construction land ecological suitability evaluation . The evaluation factors weighted graphics overlay final composite map, the suitability rating zoning map . Jianyang City construction land ecological suitability divided into five overall seems suitable land for construction of the development potential of Jianyang City , but by some factors . View from the top of the results of the evaluation , land suitability is not absolute , but relative suitability depends on the actual source of funds in the land supply situation , the development of engineering and technical conditions , the degree of awareness of local residents and local government decision many factors . We should give overall consideration to the ecological carrying capacity , the coordinated development of urban development and utilization of the status quo and the ecological environment , economic layout , dynamic balance in between to meet the economic development and ecological environment , to achieve its economic efficiency maximization , the most ecological environment construction optimization. The results of this study , not only to the development of cities and towns in Jianyang City scientific reference , the evaluation process also made ??some intelligent mapping explore , to make some of their own interpretation of \future work to continue research on intelligent .
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