参考样本库的线状道路空间数据比例尺估算  

Scale estimation for linear road spatial data on sample database

作　　者：樊玉鑫 郭庆胜[1] 王勇[2] 罗安[2] FAN Yuxin;GUO Qingsheng;WANG Yong;LUO An(School of Resource and Environmental Science,Wuhan University,Wuhan 430079,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China)

机构地区：[1]武汉大学资源与环境科学学院,武汉430079 [2]中国测绘科学研究院,北京100036

出　　处：《测绘科学》2022年第7期208-215,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41871378)

摘　　要：针对许多开源数据缺少比例尺信息的问题,该文建立了同一地理区域两个比例尺的样本空间数据库,在分析不同比例尺同名道路网匹配目标之间几何特征差异的基础上,提出了一种道路空间数据比例尺估算方法,通过路网匹配算法快速提取多尺度道路网空间数据中的匹配目标进行几何特征差异的计算,并且参考同一地理区域样本库空间数据,探究了几何特征差异与比例尺之间的关系。实验采用1∶500000和开源地图的同一地区道路网空间数据验证了本文所提方法的有效性,比例尺估算模型误差较小,数据处理效率提高。In view of the lack of scale information in many open source data,this paper proposed a method of scale estimation for road spatial data based on analyzing the difference of geometric characteristics of road objects in different scale,and established two spatial data bases as samples which represents the same geographical area at different scales.The road network matching algorithm was used to quickly extract the same object from road network spatial data at the different scale to calculate the difference of geometric characteristics which improved the efficiency of data processing.Moreover,spatial data samples of the road network in the same geographical region was referred to search the relationship between the scale and the differences of the geometrical characteristics.The experiment used 1∶500000 and OSM spatial data of road network in the same region to verify the effectiveness of the proposed method.The result showed that tthe deviation of scales estimated was small,and the data processing efficiency was improved.

关 键 词：多尺度 道路网匹配 几何特征差异 空间数据比例尺 

分 类 号：P208[天文地球—地图制图学与地理信息工程]