Comparation to the Methods of Interpolation with ASTER GDEM V2 Based on ICESat/GLA14 Lvliang Mountains in Shanxi Province

Abstract

ICESat/GLA14, a series of altitude points with high accuracy, it can be used for ASTER GDEM data’s accuracy correction, while the rational interpolation method is the important guarantee for the quality of ASTER GDEM data correction results. IDW, Simple Kriging, Ordinary Kriging and Universal Kriging are used in this research to make an accuracy correction for ASTER GDEM V2 based on the ICESat, and compared with the large scale topographic map of Shuiyuguan in Lvliang Mountains. Results show that the Simple Kriging is the best in the four interpolation methods. So, we hold our opinion that the Simple Kriging interpolation is more suitable for the study area of ASTER data accuracy correction.