计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (34): 95-97.

• 学术探讨 • 上一篇    下一篇

地形分析中一个基础算法的研究与改进

蒋球伟   

  1. 华北计算技术研究所,北京 100083
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-12-01 发布日期:2007-12-01
  • 通讯作者: 蒋球伟

Research and improvement of basic algorithm over terrain analysis

JIANG Qiu-wei   

  1. North China Computing Technology Institute,Beijing 100083,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-12-01 Published:2007-12-01
  • Contact: JIANG Qiu-wei

摘要: 对地形分析中用得较多、又比较花费处理时间的一个基础算法进行了研究和改进,并与现有算法进行试验比较,结果表明改进算法能够有效地减少用于求得直线段的投影与格网的交点集的时间,大大改善了进行动态距离量算、动态两点通视、动态剖面分析等的实时性,提高了效率。该算法已经嵌入到某知名军事地理信息系统的核心模块中,并在实践中得到广泛而有效的应用。

关键词: 地形分析, 算法, 数字高程模型, GIS, 距离量算

Abstract: To improve the efficiency in distance measurement and inter-visibility query and so on between two points over terrain and satisfy the real time requirement in the dynamic terrain analysis,a basic algorithm is improved.Comparing with the current algorithms,the results of the improved algorithm show that it satisfies the requirement of precision and efficiency in terrain analysis.

Key words: terrain analysis, algorithm, digital elevation model, GIS, distance measurement