多种数字高程模型内插方法实验结果分析研究

Research on the Experimental Results of a Variety of Digital Elevation Model Interpolation Method

数字高程模型DEM是利用遥感信息经过数字摄测量处理得到的经典产品之一,它是地理信息数据库的核心数据系统。目前,世界发达国家均建立了各自的数字高程模型,其广泛地应用于测绘、环境、资源和军事等多种领域,并且发挥着及其重要的作用。由于地形表面的复杂性和多变性,本文给出了多种DEM生成方法,通过实验分析各种内插方法在取不同权值时的内插精度,地面数据点的数量和分布对内插精度的影响;分析高斯贝尔曲线的最小二乘法对地表模拟精度的因素,最后综合分析了各种DEM生成方法相应的适用范围。

Digital elevation model(DEM) is one of the classic products obtained from remote sensing information through digital photogrammetric processing.It is the core data system for geographic information database.At present,DEM plays an extremely important role,and the developed countries have all established their respective digital elevation model.It is widely used in mapping,environment,resources and military fields.This paper presents a variety of DEM generation method due to the complexity and variability of the terrain surface,analyzes the interpolation accuracy of a variety of interpolation methods in the different weight values,and the influence of the interpolation accuracy on the quantity and distribution of the ground data points.Finally,this paper studies the application criteria of each various DEM generation method.