国家级基础地理实体构建技术的设计与实践

Design and practice on national basic geographic entity construction technology

针对传统测绘生产的矢量要素数据是二维形式,对现实世界的数字化抽象表达,难以完全满足在三维数字空间中分析、计算与使用的实际需要问题,该文以我国1∶50000基础地理信息要素数据为主要数据源,研究设计国家级基础地理实体数据构建的生产流程与关键技术,并结合工程实践,详细阐述了地理实体数据转换重构、语义信息补充完善、实体语义关系构建等关键技术的实现过程。形成了一套切实可行的构建地理实体的工艺流程,较好地发挥了地理实体在信息承载、表达、共享和关联等方面的优势。首批国家级基础地理实体数据产品表明,该文阐述的生产流程可以快速有效地构建地理实体数据,可为国省市多尺度地理实体的衔接整合提供数据和技术支持。

expression of the real world in the form of 2dimensions,it is difficult to fully meet the actual needs of analysis,calculation and use in the 3-dimensional digital space.In response to this issue,this paper takes China’s 1∶50000fundamental geographic information feature data as the main data source to study the key technology and production process of national basic geographic entity data construction.Combined with engineering practice,the implementation process of key technologies such as transformation and reconstruction of geographic entities,semantic information supplement and improvement,entity coding,and entity relationship construction are described in detail.A practical and feasible process for constructing geographic entities has been formed,which effectively utilizes the advantages of geographic entities in information carrying,expression,sharing,and association.The first batch of national basic geographic entity data products show that the production process described in this article can quickly and effectively achieve the construction of geographic entities data,and can provide data and technical support for the integration of multi-scale geographic entities at the national,provincial and municipal levels.