3D Perspective towards the Modelling and Applications of Cadastral Building Data in Taiwan
Jung-Hong Hong, Vincent Chiang, Chin-Sung Yang, Yi-Chen Tsia, Sin-Yi Ho
In recent years, Taiwan has been actively advancing a nation digital twin project that
leverages multi-dimensional geographic information technology. Three-dimensional building
data has been identified as a fundamental component of the national base map. In addition to
the 3D building data generated through photogrammetry and topographic mapping, data
managed by cadastral organizations is considered a valuable resource for representing 3D
buildings from a property rights perspective. Currently, Taiwan has amassed over 8 million
building registration records, each uniquely identified by a building number. This paper
examines the strategies for establishing and sharing building numbers and their corresponding
3D spatial representations to enhance their utility in GIS-based applications. Two distinct
types of 3D representations have been developed: building number positioning points and
cadastral building property model. Based on Taiwan's existing building registration
framework, a schema for 3D cadaster buildings has been designed utilizing CityGML 2.0
Application Domain Extensions (ADE), which offers advantages in terms of alignment with
international standards and the facilitation of open format data sharing. The proposed schema,
characterized by clear semantics, is capable of accommodating the modeling of various types
of building, including apartments and high-rise structures. Furthermore, new construction
procedures have been integrated into the existing building registration process. Cadastral
building data in the future will not only feature three-dimensional spatial representations but
also improve interoperability through standardized models. This advancement is expected to
yield significant benefits by fostering innovative multi-purpose applications of three-dimensional
building information and supporting the development of the national spatial data infrastructure
Event: 12th International FIG Workshop on LADM & 3D LA
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