A space-based approach towards the modelling of 3D Building

Abstract

With the rapid technology evolution 3D GIS has been successfully applied in various applications in recent years such as urban planning facility management or solar analysis Although the creation of 3D geospatial data becomes increasingly easier there remains many challenges before the benefits of 3D GIS can be fully demonstrated For example due to the lack of agreement on how 3D phenomena are modelled the heterogeneity of vendor-based 3D data formats remains a big obstacle to the development of 3D GIS Meanwhile the diversity of 3D modeling approaches for creating geospatial data also makes the specification data quality and applications of 3D geospatial data rather different hence also tremendously impedes the sharing and interoperable use of 3D data collected by different stakeholders By arguing the real world can be seen as the aggregation of an indefinite number of “space” this research proposes a “space-based” approach for modelling the 3D earth phenomena and choose 3D building as the examples to validate the feasibility of the proposed model This model must have built-in capability to ensure the distinguished characteristics of geospatial data can be formally presented and recorded in a standardized way such that 3D geospatial data can be easily exchanged and shared among domain stakeholders We start by examining the essential and necessary information for modelling a primitive space A common 3D building description model is then extended from this primitive space where each extended class is further enriched with semantics and thematic attributes according to the described targets This space-based framework provides the flexibility of extended design and a hierarchical framework to group a number of lower-level spaces into a more complex space Based on the chosen perspectives we further compare the proposed 3D building model to two international 3D data standards namely CityGML & IFC The comparative results indicate despite these two standards area widely used both of them have their respective limitations such that certain aspects may not be appropriately modeled or information is lost during data exchange By using the space-based approach on the modelling of various types of buildings in Taiwan this research further demonstrates the proposed model will not only improve the self-description ability of each classes of 3D building data but also facilitate the possibility of sharing heterogeneous 3D building data in the SDI environment

Date of Award	2020
Original language	English
Supervisor	Jung-Hong Hong (Supervisor)