摘要
针对对象空间整体分布态势不均,导致覆盖面积信息具有片面性的问题,提出建筑覆盖面积动态信息的POI数据生成方法。研究区域分析网页数据存储格式,引入垂直搜索下的聚焦爬虫采集建筑覆盖面积相关数据,分类、清洗原始数据问题。纠正采集数据坐标,统一待更新的数据和已经存在的数据坐标系。引入Densi—Graph计算POI核密度,观察密度值和相对应的闭合曲线所构建的面积,分析半径整体变化状况,得到密度等值线临界值,以此判断建筑覆盖面积区边界,将边界内部的动态信息定义为最终的建筑覆盖面积动态信息的POI数据。实验结果表明,通过核密度计算观测对象空间整体分布态势,带宽区间确定为3000~3500 m,能够满足城市空间结构分析的需要,不同区域蔓延指数存在差异,有利于建筑覆盖面积动态信息生成。
At present,the uneven distribution of objective space leads to one-sided information of coverage area.Therefore,a method of generating POI data for dynamic information of building coverage area was presented.In the research area,the format of Web data storage was analyzed.The focused crawler based on vertical search was introduced to collect the data of building coverage area,and the original data were classified and cleaned.Moreover,the coordinate of collected data was corrected,and then the data to be updated and the existing data coordinate system were unified.The core density of POI was calculated by Densi-Graph.The area constructed by density value and corresponding closed curve was observed.The overall change of radius was analyzed.The critical value of density isometric line was obtained to judge the boundary of building coverage area.The dynamic information in boundary was defined as the POI data of the final dynamic information of building coverage area.Simulation results show that the overall spatial distribution of objects is calculated by nuclear density,and the bandwidth range is determined as 3000-3500 m,so it can meet the needs of urban spatial structure analysis.The sprawl indexes of different regions are different.This is conducive to the generation of dynamic information of building coverage area.
作者
乔雪
卢海军
邓琳
QIAO Xue;LU Hai-jun;DENG Lin(School of Architecture and Civil Engineering,Qiqihar University,Qiqihar Heilongjiang 161006,China)
出处
《计算机仿真》
北大核心
2020年第8期366-370,共5页
Computer Simulation
关键词
建筑
动态信息
生成
Building
Dynamic information
Generation
