Two-Dimensional Algorithm for Resampling Digital Elevation Model Data
ABSTRACT Atwo-dimensional interpolation algorithm for resampling Digital Elevation Model (DEM) data is described. This procedure can be used to calculate elevations and surface slopes at predetermined spatial distances. The algorithm uses polynomial approximation functions and weighting functions to insure smooth interpolation surfaces. It was developed and illustrated for determining elevations at 33.33-m intervals from a 30-m DEM base.