Abstract
Abstract. Nowadays, the three-dimensional visualization of cities is becoming feasible and popular. The applications serve key sectors of urban development including architecture and urban planning. The implementation of BIM in the geospatial environment will help in evaluation of the design proposals by answering questions such as “What windows have views of a particular spot?”, “How will a design proposal affect views and shadows in an urban scene?” from multiple stakeholder perspectives.This paper presents an approach that facilitates the integration of BIM and geo visualization. 3DCityDB4BIM is a concept for combining existing open source software and open specifications for efficient data management and visualization of Building Information within its broader context. 3DCityDB4BIM core components are the 3DCityDB, the BIMServer, CesiumJS viewer, and the existing standards (glTF, CityGML and IFC). The paper presents the procedure used to enable the development of this new expert system as applied to the context of 3D Web GIS. A thorough analysis of the strengths and weaknesses of these different components has been undertaken to employ their strengths and overcome their weaknesses. The system architecture is providing an extension to the 3DCityDB linking to BIMServer without violating indoor information privacy issues. The 3D visualization format glTF works as the integration medium to visualize BIM and CityGML data in web browsers without plugins or other additional software on the client side. The developed software is open source.
Highlights
Earth’s population is growing, cities are getting bigger and with-it construction industries, facility management and the geospatial domain are developing new methods to tackle upcoming challenges, like developing more efficient methods to aid construction projects and managing big amounts of data (Song et al 2017)
Integration of BIM within GIS for visualization-only use cases such as communication of urban information and virtual reality, which do not necessarily rely on spatial operations, but where BIM is visualized within 3D city models have been found as an important application for 3D city models (Arroyo Ohori et al, 2017)
In this paper we present a Web based 3D GIS solution that allows linking Building information models stored in BIM server (BIMServer, 2019) within 3D city models
Summary
Earth’s population is growing, cities are getting bigger and with-it construction industries, facility management and the geospatial domain are developing new methods to tackle upcoming challenges, like developing more efficient methods to aid construction projects and managing big amounts of data (Song et al 2017). Integration of BIM within GIS for visualization-only use cases such as communication of urban information and virtual reality, which do not necessarily rely on spatial operations, but where BIM is visualized within 3D city models have been found as an important application for 3D city models (Arroyo Ohori et al, 2017) It aims to provide: 1) Visualization of the urban environment 2) Visualization of design proposals 3) Online. In this paper we present a Web based 3D GIS solution that allows linking Building information models stored in BIM server (BIMServer, 2019) within 3D city models It is extending the 3DCityDB (open source database system for semantic 3D city and landscape models) (Yao et al, 2018) with a link to BIM Server.
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