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说明：  ： 分析当前国土资源信息系统的现实需要和发展趋势， 说明了建立新型国土资源信息系统的必要性； 重点研究了当 前国土资源信息系统建设的关键技术。这些关键技术对提高国土资源管理的效率以及现代化水平起到了巨大作用， 取得 了良好的经济效益和社会效益。(: Analysis of the current reality of land resources information system needs and trends, describes the establishment of a new need for land resource information system focuses on the current land resources information system key technology. These key technologies to improve the efficiency of land resource management, and played a huge role in the level of modernization achieved good economic and social benefits.)