Abstract
Urban spaces are the main arena for the emergence, dissemination, and development of human civilization. Representing various types of information on urban spaces in a three-dimensional (3D) manner and establishing a 3D whole-space urban substrate that integrates “macroscopic and microscopic,” “aboveground and underground,” and “indoor and outdoor” spatial and temporal information are important prerequisites for creating “digital twins” for smart cities. In this study, 3D model data for urban spaces are systematically organized and integrated based on their levels of detail and geographic entities (geo-entities). On this basis, a case study is performed on the basic spatial and temporal data platform (termed the “Visual Digital Platform for the Urban Space of Shenzhen”) planned by the municipal government of Shenzhen to facilitate the construction of a “digital government.” The results show that storing multisource, heterogeneous 3D model data with a unified data model as well as logically organizing and managing these data based on geo-entity units can provide efficient technical support for integrated 3D visualization of the whole space of cities and their spatial analysis.
Published Version
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