摘要
针对道路对城市内部兴趣点数据分布有密切的约束关系,故城市内POI数据往往呈现出沿着道路分布的特征这一现象,提出一种在道路网约束下城市内部POI数据的选取算法。通过建立道路网的拓扑结构,根据POI数据的分布位置分为道路周边分布的和远离道路分布的两大类,对道路周边的点使用"间苗法"选取,对远离道路分布的点根据其分布模式决定采用"随机法"或其他方法选取。算法采用实际数据进行实验,切实可行,并得到了合理的结果。
The urban POI data has a character of spreading along the roads network.Based on this phenomenon,this paper introduces a selection approach for urban POI data under the restrictions of road network.Firstly build the road network topology structure,then divide the POI data into two groups：one group that contains points locating close to road network and one group that contains points locating away from road network.Apply the thinning selection approach for the first group and apply the random selection approach or other suitable approach for the second group.Experiment results are reasonable and correct,which means the new approach is practical in actual data processing.
出处
《测绘科学》
CSCD
北大核心
2017年第1期59-63,共5页
Science of Surveying and Mapping
基金
科技部公益性行业专项(B1403)
测绘地理信息公益性行业科研专项(201412003)
关键词
POI选取
道路网
拓扑结构
间苗法
随机法
POI selection
road network
topology
thinning approach
random approach
