Design and Implementation of 1∶500 000 Database System of Land Use Based on MAPGIS
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摘要: 土地利用资料是国家重要的基础地理资料.针对全国土地利用数据进行建库管理会对国家建设起到重要的作用.以MAPGIS为基础, 按照一定的设计原则提出系统总体上应有的数据编辑、查询、统计等六大模块及其主要的功能.详细说明了在MAPGIS平台的支持下全国土地利用数据库的数据组织方式, 以及外部属性与图形数据的关联方式、图库中图元的B+ 树索引的结构、数据检索、输出流程等关键技术问题的解决方案.Abstract: The professional database system has been developed to manage the land use data, which is the main geographical data of China and will play an important role in the land resources management. On the basis of MAPGIS and according to a few designing guidelines, we present six function modules of the system such as data editing, data query, data statistics and so on. Meanwhile, we explicate the solution to some technical problems such as the data form, attribute relationship with graphics, the B + tree index of graphic cell of database, flows of data query, etc.
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