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China has long been a major agricultural country , arable land is the most important natural resources , the ever-accelerating land desertification and urbanization , industrialization process , the sharp drop in the amount of cultivated land . Faced with this situation , we should actively promote the intensive and economical use of the land , so as to ensure the economic and social sustainable development [1] . Therefore, the study of urban land intensive use become important issue . The main subject of urban and rural construction land and urban land for the evaluation , establishment of urban land intensive use evaluation system for the main content . The research goal of this article is the central city of Chengdu , Chengdu, the central city parcel data evaluation database , make full use of GIS data in the integrated type , query statistics , spatial analysis and visual expression of disciplines advantage , to carry out urban land intensive potential evaluation . Geographic Information System (GIS) is a system of computer hardware , software , and different methods , the system is designed to support spatial data acquisition , management, processing, analysis , modeling and display , in order to solve complex planning and management problems . Achieve urban land intensive use evaluation system using GIS spatial overlay analysis , meta- data technology , database technology , WebMap OpenLayer as well as three-dimensional GIS technology design and R \u0026 D for the Urban Land Use Intensity calculation indicators data intelligent extraction, the index system of dynamic management of land available for pre- evaluation as well as three-dimensional positioning browsing . The study provides a more comprehensive decision support these features intensive use of land , improving land saving and intensive use has played a significant role in promoting .
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