摘要
建立DEM模型时需要对离散的高程点进行空间插值,实现这一目的的插值方法有很多种。文章主要选择了6种常用的插值方法,分别在平原、丘陵和高山几种不同复杂程度的环境下对其插值的精度使用交叉验证方法进行评估。结果表明,同样的插值方法对不同复杂程度的地形效果是不一致的,多种插值方法中以克里金插值方法的插值适用性最强,精度最高。
There are many methods can be used for spatial interpolating of discrete elevation points when build DEM model.This paper chose six kinds of interpolating methods applied in plain,hilly and mountain region,and applied cross-validation method to evaluate the interpolating accuracy.The result shows,the effectiveness of same interpolating methods are different at different complex degree of terrain,the precision interpolation of Kriging interpolation method has strongest applicability and highest accuracy of the several interpolation methods.
出处
《测绘与空间地理信息》
2011年第5期99-102,共4页
Geomatics & Spatial Information Technology
关键词
DEM模型
克里金插值
交叉验证
均方根预测误差
DEM model
Kriging interpolation method
cross-validation
Root-Mean-Square error
