The Establishment of Spatial Information Extracting Model -Application on Land Appraisal

• Main Authors: Xu, Zhi-Fen, 許芝芬
• Other Authors: Zhou, Tian-Ying
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/52213091443667758715

碩士 === 逢甲大學 === 土地管理研究所 === 85 === The phrase "land inbreeds fortune" reveals not only the close relationship between land and human life, but also one of the four important factors of productivity. Land characteristics such as supply substantiality, non-mobile objects, non-alternative targets and incomplete market information, compose the differences from other commercial products. Optimum resource allocation of land can hardly be reached by free market mechanism. It is obviously that social problem coming from unequal social resources allocation and inefficiencies will be derived from non-controllable market reasonable price. There are abundant literature studies on the topic of land appraisal. The goal of this paper is not to assess land price or examine land appraisal parameter, but to construct the spatial information extracting model for factors which influence land price.The appraisers used to collect a lot of appraisal related data and conduct some onsite survey, in order to accordingly estimate the land value. Therefore workload was very heavy and time consuming. This study took the advantages of the fast-computing and mass data-storing capabilities of a computer, and mean while applied the GIS technique to the establishment of data file for the appraisal process. So that the time and labors can be saved and the efficiency of the assessment of land parcels can be enhanced. Taichung city in Taiwan was selected for an empirical test area. An existing land appraisal model is applied in this test to analyze the issues of spatial data including (1) establishment of criteria for data extraction, (2)investigation of spatial relationships among objects, such as distance, direction, and topological relationships, and (3)the design of spatial data analysis process for land appraisal.The result indicated that all spatial analysis is based on the feature topology, and network analysis is the most important tool for spatial analysis. Auto-extracting information can serve as a useful tool the assessment of external environment condition and can improve the appraisal technique. But it is non-efficient in the assessment of internal basic site information.