分幅等高线接边算法的设计与实现

分幅数字化后相邻图幅的等高线拼接问题,是地理信息系统中数据处理方面必须解决的问题.在吸取了ArcGIS处理该问题的优点的基础上,提出了分幅等高线智能化接边的约束条件和算法,并利用ArcGIS Engine实现该处理方法.在该算法的实现过程中,运用等高线的几何关系和属性特征进行对接边等高线的筛选,在充分考虑接边存在的各种异常情况前提下,确定接边规则,从而实现等高线的无缝拼接.

Design and Implementation of Edge Matching Algorithm of Intersected Contour Lines

The edge matching problem of the contour lines which are divided into a lot of parts artificially must be solved during the handling process of foundation data in geographical information system（GIS）. On the basis of absorbing the advantages of ArcGIS at handling the problem,the restrictive conditions and algorithmic of intelligentized edge match about intersected contour lines were put forward,and ArcGIS Engine（AE） was used to realize the method. During implementing,the geometrical relation and attribute characteristics were used to sift the intersected contour lines,and the edge matching rules were determined considering various abnormal conditions,then the seamless match of contour lines were ultimately realized.