自动制图综合中的线目标位移模型

A Model for Road Network Displacement in Automated Map Generalization

数字地图制图环境下的自动综合是一个国际性的难题,其中地图要素的关系处理又是自动综合中的重点和难点之一,位移操作是关系处理的一个重要方法。本文以道路网的目标变形位移运用弹性力学思想进行理论和方法上的探讨,实现空间目标冲突的探测,进行目标的受力分析,运用平面杆件弹性体的受力变形模型,得到目标的位移量。该方法顾及目标间的空间关系,运用优化方法解决和控制位移的传播。

Automated generalization in cartography is a bottleneck in the development of digital cartography and how to deal with the relationship of map features is one of the issues of it, while the displacement is an important way to deal with the relations. This paper attempts to discuss how to solve the displacement by the theory of Elastic mechanics. Based on Finite Element Method we achieve to explore the conflicts of targets and do some analysis of the force bearing on the targets. As an example we aggregate the road network targets regarding this aggregation as an elastomer. And then the work can get the size of the displacement with a plane pole model elastomer. All of the spatial relationship has considered in this method, and we can use an optimum method to solve the problem of displacement＇ s spread.