基于规则格网DEM提取山顶点的研究

Extracting Mountain Peaks based on Grid DEM

以陕西黄土丘陵地区为例,通过分析山顶点的形态特征,利用GIS软件平台,采用栅格数据的空间分析,窗口计算功能以及叠置分析提取规则格网DEM的山顶点。实验结果表明,通过设置不同的邻域分析窗口和高差阈值,两者在山顶点提取中呈自相关性,为规则格网DEM提取山顶点时受尺度阈值的影响供了研究基础。

This paper takes loess hilly region of Shanxi Province as an example. By analyzing the morphological characteristics of peak point,the GIS software platform,raster data spatial analysis,window function and the superimposed analysis are used to extract the top of the mountain from regular grid DEM. The experimental results show that the two points extracted at the top of the mountain are the correlation by setting the different neighborhood analysis window and elevation difference threshold,which is the basis of the extraction of DEM terrain characteristics affected by scale threshold.