城市存量道路要素自动构建地理实体研究

Research on the automatic construction of geo-entities by urban stock road elements

针对当前的存量要素构建地理实体的流程和方法存在较多的人工编辑工作量的问题,该文设计了一种城市存量道路要素自动构建地理实体的方法。该方法首先基于道路连通度和道路名称确定道路实体完整中心线,其次利用道路面片段和完整中心线的道路名称、道路类型、最大距离、相交长度、Hausdorff距离小于50m的部分占比等指标综合匹配生成道路面片集,最后根据空间关系完成道路实体的概略图形、实体标识码、图元和属性自动组装。基于上海存量道路数据自动构建道路实体的实验表明:该方法构建效率高,准确率达到94.6%,召回率达到95.0%,可以有效地缩短构建周期和节约成本,研究结果可以应用于各省市道路实体构建,也可应用于河流类地理实体构建。

According to the fact that there is a lot of manual editing workload in the current process and method of constructing stock elements to geo-entities,this paper designs a method for automatically constructing geo-entities from urban stock road elements.This method first determines the complete centerlines of the road entities based on the road connectivity and road name,and secondly generates road surface segment sets by using the road name,road type,maximum distance,intersection length,and the proportion of the part whose hausdorff distance is less than 50m,and other indicators of the road surface segments and the complete centerlines,and finally completes the automatic assembly of rough graphics,entity identification codes,geometry primitives and attributes of road entities according to the spatial relationship.The experiment of automatic construction of road entities based on stock road data in Shanghai shows that this method has high construction efficiency,the accuracy is 94.6%,and the recall is 95.0%,which can effectively shorten the construction cycle and save costs.The research results can be applied to the construction of road entities in various provinces and cities,as well as to the construction of river-like geographical entities.