T/CAGIS 14-2024 Urban Spatial Semantic Entity Model Data Format

Scope

Scope: This document specifies the basic requirements, model definition, and storage structure for urban spatial semantic entity model data. This document is applicable to the creation, expression, storage, exchange, and application of urban spatial semantic entity model data. Main technical content: This document defines an open and extensible semantic entity model (SEM) and data format for urban areas, aiming to achieve multi-dimensional integrated expression, multi-modal organization and storage, and cross-domain sharing and exchange of urban spatial data, in order to enhance the standardization and ease of use of urban spatial data products. SEM constructs spatial and attribute indexes based on entity semantic information, and utilizes information such as geometric representations, level of detail (LoD), attribute information, hierarchical structures, textural appearances, and interrelationships of common urban spatial objects to ensure the consistency and interoperability of different LoD and semantic information of urban spatial objects. SEM supports structured expansion and is applicable to the expression, storage, and exchange of spatial objects in various urban fields, capable of supporting applications such as real-time 3D, city information models (CIM), and digital twins.

Development Information

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