DEM建模中基于等高线的高程样本值预处理方法  

Method of Pre-treated Sample-Value of Elevation Based on Contou Line in DEM Modeling

作　　者：乔凯[1] 柳荣其[1] 

机构地区：[1]西华大学数学与计算机学院,成都610039

出　　处：《计算机与数字工程》2010年第7期186-188,205,共4页Computer & Digital Engineering

摘　　要：根据DEM的精度在很大程度上取决于高程样本点精度这一特性,提出了一种高程样本值的线性预处理方法。该方法将两根相邻等高线间的地形近似视为直线变化,根据这个假设应用简单的三角计算,可以计算出相邻等高线上线性变化方向上的两点连线上任意一点的高程值,即增加高程样本值的数量,又增加了样本值的精度,从而达到了提高最终DEM的精度的目标。According to DEM accuracy depends largely on the accuracy of the elevation characteristics of the sample point,this paper presents a linear elevation sample pretreatment values.This method will be between two adjacent contour lines as a straight line approximation of the terrain changes,the application of this assumption based on a simple calculation of the triangle can be calculated contour line adjacent on the linear change in the direction of any point on the two connection the elevation value,an increase of the value of the number of elevation samples,increased the accuracy of sample values,so as to achieve to improve the accuracy of the ultimate goal of DEM.

关 键 词：DEM 样本 预处理 等高线 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]