Interpolation of DEM by Using Inverse Filter

Abstract

We propose a method for interpolating a DEM (Digital Elevation Model). Our method is executed by smoothing the DEM and restoring it to the original DEM by using an invers filter. At this time, by automatically finding the optimum value in the parameter of the inverse filter, it is possible to interpolate the DEM with high accuracy. Through the experiments using the DEM of 5m mesh, we demonstrate the effectiveness of our method.