顾及制图规则的地图多要素协同移位方法

Method on Collaborative Displacement of Map Features Considering with Cartographic Rules

在地图自动编制中,有时多类地图要素多个空间目标之间同时发生空间冲突,在移位过程中会影响到邻近区域的地图目标,这就需要对地图要素移位进行协同处理。在自动识别邻近空间冲突区的条件下,提出了一种顾及地图制图规则的解决地图目标群空间冲突的协同处理方法,并用参数表方法形式化表达了地形图上地图要素移位的常用制图规则。首先利用约束性Delaunay三角网识别出可能的空间冲突区域,并建立移位操作区;然后,建立移位传播关联线网,依据制图规则在关联线网上以能量最小化Beam移位模型为基础,对整个空间冲突区的地图目标群进行协同移位;最后,用实验验证了所提方法的有效性和适用性。

In automatic map compilation,spatial conflicts among various spatial objects in maps occur at one time.The displacement of these objects will influence their proximity objects,so the collaborative displacement of them is needed.In this paper,we try to put forward a collaborative method for solving spatial conflict among various spatial objects after identifying spatial proximity conflict automatically,based on cartographic rules which are common in topographic map compilation.Rules related to map feature displacement are formalized with help of a parameter table.Firstly,the possible conflict area is recognized automatically based on constrained Delaunay triangles,then regions in which map features could be shifted are identified,and defined as operational displacement zone.In this zone,associated line networks for displacement propagation is established.Map objects in this zone are shifted collaboratively based on associated line networks and Beam displacement model of energy minimization,considering cartographic rules.At last,the effectiveness and availability of this given method in this paper is verified by means of the experiment.