关键词: 实景三维中国, 基础地理实体, 工程化建模

Abstract: The Ministry of Natural Resources proposes that the national, provincial, and municipal levels should collaborate to undertake the development of 3D realistic geospatial scene of China, create fundamental geo-entity data products, and establish a unified spatial positioning framework and analytical foundation for Digital China. Large-scale, multi-type, multi-scale and multi-granularity geo-entity modeling is a key technical problem in the 3D realistic geospatial scene of Chinese technology system. Based on the practice of basic surveying and mapping in China, this paper proposes a technical approach for engineering and large-scale modeling of national fundamental geo-entity, which involves clarifying the concept connotation, constructing the content system, designing the data model, and formulating the technical specifications. It studies and designs key technologies such as the concept connotation, content and classification, scale and granularity, and data model of fundamental geo-entity, and introduces three main technical methods for engineering implementation.

Key words: 3D realistic geospatial scene of China, fundamental geo-entity, engineering modeling