Indoor and Outdoor 3D Data Organization Based on Anchor Node Extension

Abstract

Building model data organization is often a single application for a specific problem resulting in problems such as the inability to organize indoor and outdoor 3D scenes in an integrated manner. Existing building spatial data models are studied, and the characteristics of building information modeling standards (IFC), city geographic modeling language (CityGML), indoor modeling language (IndoorGML) and other models are compared and analyzed. for the difficulty of meeting different application scenarios and needs in terms of CityGML and indoorGML model expression, the indoor space and outdoor space are integrated by using the The anchor nodes defined in the IndoorGML standard are used to connect the indoor space and outdoor space. In order to realize the association between the two data standards of IndoorGML and CityGML, the anchor node has attributes such as absolute position and address through the extension, and these attributes are added to realize a neutral association method between the two data standards to adapt to the data changes in different situations. In this paper, we propose an indoor and outdoor 3D data organization method based on the extension of anchor nodes, and this association mechanism provides a high-precision and seamless bridge for data organization and interaction between indoor and outdoor environments, and a 3D visualization system is constructed based on it to validate the effectiveness and feasibility of the method.