摘要
在传统缓冲区分析基本思想的基础上,提出基于空间对象缓冲区分析定义,区别在于邻域半径:前者为常量,后者为变量。设计实现基于空间对象缓冲区分析算法,该算法以空间对象为计算粒度,分为计算缓冲区边界点、生成缓冲区多边形、筛选缓冲区多边形内空间对象3个步骤,并从算法执行机理的角度对其做定性与定量评估。结果表明,该算法解决了传统缓冲区分析难以处理图层内以空间实体为分析粒度的问题,时间和空间复杂度亦优于传统缓冲区分析算法。
On the basis of the theory of traditional buffer analysis,a novel buffer analysis which is based on spatial object is proposed.The difference between them lies on neighborhood radius which is a variable in the new concept while it is a constant in the traditional theory.In this paper,a buffer analysis algorithm based on spatial object is designed and implemented which adopts spatial object as the granularity of computing.The algorithm can be divided into three phases：firstly,calculating boundary points of the buffer zone;then,building buffer polygon;finally,filtering spatial objects in the buffer polygon.The qualitative and quantitative assessment of the algorithm was presented from the perspective of the mechanism for its implementation.Corresponding analyses indicate that compared with the traditional buffer analysis algorithm,the algorithm based on spatial object has the advantage of less memory and time cost,and has solved the problem which can deal with the analysis that the granularity of computing is spatial entities within layer.
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2011年第1期38-41,共4页
Geography and Geo-Information Science
基金
广西科学研究与技术开发计划项目(桂科能0992030-1
10100018-2)
广西高校优秀人才资助计划项目(桂教人[2009]62号)
关键词
空间分析
缓冲区分析
空间对象
阻碍效应
spatial analysis
buffer analysis
spatial object
obstruction effect
