The digital surface model (DSM) is used for several purposes in photogrammetry, remote
sensing and laser scanned data such as orthoimage production, contours derivation,
extraction of height information. Creation of a surface model from point-clouds (3-D
sparse points) that can be derived from stereo imagery and range data (e.g. laser
scanned data) can be done with several mathematical interpolation models. In this
paper, thin-plate-spline (TPS) is used for digital surface modeling. Determination of
suitable weight is an important problem in thin-plate function for a surface. The
Voronoi algorithm has been proposed as a method for determination of the weight in thin-
plate-spline. In this paper,methods has been tested for different surfaces. The results
show that thin-plate-spline can be independent of weight.
