Conceptual Modeling and File Encoding of Provincial Cadastre System in Anhui Province, China

Abstract

This paper reports the design, encoding, and validation of a cadastre conceptual model for the unified registration of immovable properties in Anhui Province, China. First, a TF-IDF method was employed to extract all the fundamental concepts from a large amount of cadastre related regulations. Then, ISO 19152 LADM was extended with these concepts, creating an Anhui provincial cadastre conceptual model. Finally, CityGML Application Domain Extension and its encoding mechanism were employed for model encoding. A preliminary validation with case studies in Anhui Province, China demonstrates the expressiveness of this conceptual cadastre model and the compatibility with a series of OGC and ISO standards of its encoding files. The application of this model in the cadastre education also demonstrates its advantages compared with existing cadastre knowledge framework. The work described in this paper extends existing efforts of China’s cadastre conceptual modeling and is beneficial for both cadastre researchers, administrators, and system developers in China.