Abstract:
With the rapid development of computer and information technology, land grading and standard price appraisal is treated as a fundamental unit for land management. In order to change the traditional ma-nual work process, reduce the human intervention, and increase the speed and accuracy of calculation, data-base technology must be added into this work and GIS based land grading and standard price appraisal data-base management platform must be established to meet this demand of land management. Due to this reason, the research put forward the innovative mixed vector-raster spatial data format to build the database of the factors and indicators for land grading and standard price appraisal calculation process and applied the cost distance and other spatial analysis algorithms to build the work procedure database and result database which are also generated on mixed vector-raster data format. This mixed format database and land grading and standard price appraisal procedures make up the deficiency of the most used land evaluation database system based only on vector data format in China, and overcome the problems such as big amount of calculation process, inaccurate results, and incomplete data. It also enhances the efficiency of land grading and standard price appraisal work and provides an optimized choice to get more accuracy results. At last, this research set the downtown area of Chongqing as the research area, demonstrated the feasibility of the database and algo-rithms for land grading and standard price appraisal work, and obtained the accurate results of land grading and standard price appraisal in the downtown area of Chongqing.
