The Establishment and Management of Mass Appraisal Database

As a complicate and systemic program, the mass appraisal of real estate relies heavily upon data. The accuracy, integrity and applicability of data greatly affects the effectiveness of appraisal work. Nowadays, because of the diversity of data acquisition ways, real estate data increase explosively, which brings challenges to data collection, storage, management, sharing and usage. To normalize the real estate data, thus guarantee the precise and completeness of appraisal result, it is necessary to construct a real estate database of high-reliability, high-scalability, and high-integrity. Due to the differences in cultures and national conditions, the real estate data are various among countries. As home to more than 17% of the world’s population, China is facing to huge volume real estate data of high complexity, which makes it hard to collect and manage data. On this background, by analyzing real estate data, we discuss the technology route of constructing real estate database under GIS, and study data integration technique for real estate mass appraisal. At last, we take Shenzhen city as an example and verify the effeteness of our methods.