The interpolation algorithm uses a iterative linear solution which allows both height points and contour lines as input data. The interpolation algorithm iteratively fills the whole terrain, and the results show that it produces less deviations to the original data. Especially the morphological features are represented more naturally with the developed interpolation algorithm, and the resulting DEM is visually pleasing since the artefacts of triangulation are not present. Contours and stream lines. Triangulation from contours and stream lines.
Flat triangles are red.
Pixel size is 25 meters. Pixel size is 5 meters. Hillshaded raster based DEM, which is interpolated using standard raster algorithms. Hillshaded raster based DEM, which is also interpolated using standard raster algorithms and smoothed afterwards. Pixel size is 5 meters.