%0 Journal Article %A ZHANG Yongliang %A ZHU Meizheng %A LI Xin %A ZHENG Hao %T Algorithms of DEM interpolation based on dense and sparse elevation points %D 2014 %R %J Computer Engineering and Applications %P 167-174 %V 50 %N 1 %X Considering the accuracy, efficiency and smoothness of DEM interpolation, discrete points is divided into two cases which are dense and sparse. According to dense case, the paper puts forward partition algorithm for fast constructing triangular mesh, then inserts point by point DEM interpolation; according to the sparse case, it analyzes the adverse factors of triangular mesh, and puts forward Gauss weight-vector basis method for DEM interpolation. %U http://cea.ceaj.org/EN/abstract/article_31391.shtml