采用拓扑关系与道路分类的立交桥整体识别方法

The Integral Identification Method of Cloverleaf Junction Based on Topology and Road Classification

结构复杂、形态繁多的立交桥结构是道路网的重要组成部分。大比例尺地图中立交桥结构的识别对道路网的拓扑关系构建、自动综合、匹配、更新,乃至城市居民地等相关要素的研究都具有重要影响。当前在道路网数据匹配更新过程中尚未对立交桥结构进行深入的研究,关于立交桥识别方面的研究也相对较少。本文参考道路桥梁专业中立交桥的分类方法,概括出不同种类立交桥的图形。对这些图形自身构建拓扑关系,利用道路分类方法判断图形中每条弧段的道路类别,并统计数量,建立立交桥图形的量化表达式。在识别过程中通过比对量化表达式来识别出立交桥结构及其类型。

Cloverleaf junction of complex structures and shapes occupied an important status in road network,which had significant influence on topologic relationship building,automated generalization,road matching,updating,and even the study of city habitation.However,there was still lack of deep study on the cloverleaf junction structure in the process of road network data matching and updating,and there was also less study on cloverleaf junction identification.Referring to the classification method of cloverleaf junction in the road and bridge specialty,the graphics of different kinds of cloverleaf junction were generalized.Topology was built about these graphics,and estimating the road kind of every arc in the graphics was estimated by using the road classification method and the number was counted.Then quantitative description was built about cloverleaf junction graphics.The cloverleaf junction structure and its kind can be identifed by comparing the quantitative description during the identification process.