Color Figures from Geographical Information Systems, Second Edition (27 of 67)

Plate 26 Interpolation of a DEM from scattered point data using methods available in GIS: (a) given data and Voronoi polygons; (b) TIN-based linear interpolation; (c) inverse distance weighting; (d) Kriging (spherical variogram); (e) spline with tension and stream enforcement; and (f) regularised spline with tension and smoothing.