摘要
在研究基于规则格网数据地形特征提取过程中,主要有断面极值法和流水模拟法。在断面极值法中,针对传统断面极值法生成的特征线存在零碎、并行交叉等缺点,我们改进了传统的局部断面极值法,在特征线连接过程中增加了“将特征点邻域内其它候选特征点设置为已被引用、根据特征线长度与范围阈值筛选特征线”等条件,以克服生成的特征线存在的零碎和并行交叉问题。
In the study of the method for extracting topographic patterns based on Grid data,including the terrain profile analysis method and the falling water simulations method.In the terrain profile analysis method,as feature lines which are generated by the traditional terrain profile analysis method exit the problems of fragmentary、parallel and crossing,we optimized the traditional method by adding the following conditions' the neighborhood unused feature points which are around the used points are set the used points&feature lines are screened by their length and their scope'.By doing these,we successfully solve the exiting problems in the traditional terrain profile analysis method.
出处
《现代测绘》
2007年第3期11-12,31,共3页
Modern Surveying and Mapping
关键词
地形特征提取
断面极值法
Topographic patterns extraction
The terrain profile analysis method
