摘要
随着社会信息化的发展,作为GIS基础数据的数字地形图在各领域起着越来越重要的作用。但是由于地形图分幅管理的习惯造成地理目标实体被人为分割,所以如何在确保精度的前提下,进行快速、准确、无图幅限制的接边是摆在我们面前的一个课题。本文总结了现有接边算法存在的不足,提出基于单条接边线的缓冲区分析来代替矩形接边线的缓冲区分析,避免地物的重复匹配,充分利用属性约束条件的接边算法。通过减少地物匹配的次数来提高接边的效率,并将其应用于实践,取得了很好的效果。
With the development of the informationization,as the GIS basic data,the digital topographic map has played a more and more important role in all fields. However,as it was gathered by the division which results in the geography entity was divided factitiously. So on the condition of guaranteeing the precision, how to implement edge matching quickly, accurately has been a problem for us. This paper summarizes the deficiency of the current edge matching firstly, and then it raises the algorithm that using single line replaces rectangle line for avoiding objects repeat matching and making the best of the objects attribute. Through reducing the times of matching to improve the efficiency, it has achieved a great improvement when put into the practice.
出处
《测绘与空间地理信息》
2010年第2期76-78,共3页
Geomatics & Spatial Information Technology
