计算机工程与应用 ›› 2013, Vol. 49 ›› Issue (16): 165-167.

• 图形图像处理 • 上一篇    下一篇

利用拓扑关系快速提取鞍部点

孔月萍1,2,易  炜1,张跃鹏2   

  1. 1.西安建筑科技大学 信息与控制工程学院,西安 710055
    2.西安测绘研究所,西安 710055
  • 出版日期:2013-08-15 发布日期:2013-08-15

Extracting saddle point fast based on topological relationship

KONG Yueping1,2, YI Wei1, ZHANG Yuepeng2   

  1. 1.Xi’an University of Architecture and Technology, Xi’an 710055, China
    2.Xi’an Research Institute of Survey and Mapping, Xi’an 710055, China
  • Online:2013-08-15 Published:2013-08-15

摘要: 从鞍部点的形态特征出发,利用移动窗口法预提取出符合地形结构的鞍部特征点,对DEM(Digital Elevation Model,数字高程模型)数据进行等高距分层以模拟出等高线地图的地貌特性,从而考查特征点与周围区域的拓扑关系,剔除未处于鞍部地区的伪特征点。实验结果表明,算法快速简便,所获取的鞍部点符合地貌认知。

关键词: 鞍部点, 特征, 数字高程模型(DEM), 等高线地图, 拓扑关系

Abstract: Based on the analysis of the saddle’s characteristics, extract the feature points by using the mobile window method, then layer the grid DEM data in order to simulate the geomorphic characteristics of contour map. Thus distinguish them by examining the topological relationship with its’ surrounding area. The experimental results show that the algorithm is fast, simple and fit the landform cognition.

Key words: saddle point, characteristics, Digital Elevation Model(DEM), contour map, topological relationship