Urban Land Grading Information System On Component GIS

21st century is information and industrial age. Rapid development of technology drives every walk of life to stride forward information. Since our economy become from arranged mode to market mode, land market grows up from nothing to being. Along with payable use system of land reformatting and market system of land perfecting, land market becomes to be disciplined. In the modern society that computer technology development at very fast speed, land grading and evaluating as a basic task of land trade, in face of challenge of information society, that must depend on GIS to establish a computer system that service for its own profession. The system can alter traditional handmade manner and improve speed and precision of operation.In the society of GIS developing at very fast speed, Component GIS is a new generation GIS System that adjusts to component development of software. Component GIS widens the thought of urban land grading operator. It is a new GIS technology, which developments based on COM technology. It encapsulates all kinds of function of GIS by component, good capability and low price. And when programming, programmer can organize the structure of system based on need. We select SuperMap exploited by ChaoTu Company and VB language to exploit Urban Land Grading Information System. The system is used in Urban Land Grading and evaluating of PingYi City. Now I will carefully introduce the job of the paper.Firstly, the meaning of founding Urban Land Grading Information System is discussed and the development of GIS is summarized. The research on Urban Land Grading and evaluating inside and outside our country is summarized.Secondly, the characteristic of Component GIS, structure of soft, structureand product of GIS Component are introduced. Then the design and exploitation of Component GIS are talked about.Thirdly, Urban Land Grading is summarized. The founded technology path ,design thought,research method and design principal of system are set forth, the used soft and run environment of system are described. The flow and database of system are introduced, the function of system and established method and skill of all modules are expounded and analyzed in detailed.At last, after the system is analyzed, the characteristic of system and the founded meaning of system are summarized. Then the innovation of system is brought forward and the application foreground of system is prospected.Although plenty of research on Urban Land Grading Information System and Component GIS are discussed in the paper, it is not complete, a great many of information need to be consulted farther. Moreover, the functions of system also need to be improved. In the end, the shortage of system is put forward.