顾及上下文的线状目标实体派生方法

针对制图自动综合中发现的线面数据存在的没有构建空间实体拓扑问题，本文提出一种顾及上下文的线状目标实体派生方法。首先，对围墙线、附属设施和建筑物建立空间拓扑邻近关系，对直接邻近群组进行聚类，然后，将其划分为3种模式，即两个围墙之间的拓扑连接、围墙与建筑物之间的拓扑连接及建筑物邻近的悬挂围墙线与建筑物之间的拓扑连接；最后，对这3种模式分别采用各自对应的最短路径、外轮廓线以及最近点的拓扑连接方法进行连接。以福建省数据为例进行试验，本文方法能够有效构建空间实体拓扑连接，有助于提高地图自动综合，同时能够满足生产实践的要求，具有很高的实用性。

Context aware derivation of linear object entities

In view of the problem that there is no space entity topology for the line data and area data found in the automatic synthesis of cartography, this paper proposes a context aware method for deriving linear object entities.First, establish a spatial topology proximity to fencelines, ancillary facilities, and buildings, clustering direct neighboring groups, it is divided into three modes, namely the topological connection between the two walls, the topological connection between the wall and the building, and the topological connection between the hanging wall line near the building and buildings; Finally, the shortest path, contour and the nearest point are used to connect the three models. Experiments with Fujian province data as an example show that this method can effectively build a spatial entity topology connection, help improve automatic map synthesis, at the same time can meet the requirements of production practice, with a high degree of practicality.