... prevention, land-related decision making, etc. Usually, the DEMs are produced by interpolating the elevations of a set of sample points for predicting the elevations at all positions inside the ... range. The main parameters of the spline interpolation are the number of sampled points used for interpolation, and the weight. For the regularized spline, the higher the weight, the smoother the ... various regions of Laos and France. The author has concluded that for a high density of sample points, all of the interpolation techniques perform similarly; and for a low density of sample...