Design and Engineering Practice of National Basic Geographic Entity Data Construction Technology

Abstract

The vector element data of traditional surveying and mapping production is a digital abstract expression of the real world in the form of 2 dimensions, 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 1:50000 fundamental 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.