关键词: 城市地下空间资源, 综合评价, GIS, 矢量单元法, 深圳市宝安区

Abstract:

GIS is frequently used to evaluate the urban underground space by mostly-used raster element, which needs to divide a fixed boundary unit controlling accuracy by its size. However, this method often produces conflicting data with a zigzag graph. Some scholars applied variable raster element, after being improved, which resolve the conflict between data redundancy and accuracy through splitting the key or sensitive area into smaller units, and extensively being used. A new method, vector element is developed based on their actual boundary, but with complicated shapes and sizes. This paper, based on a case study on Baoan district of Shenzhen, gives an introduction to the GISbased vector element method as a new means of fuzzy evaluation, presents the key technical processes in database structure design and offers an example of using vector element method.

Key words: urban underground space, comprehensive evaluation, GIS, vector element method, Baoan district of Shenzhen