# GRASS Help System

s.surf.idw -

s.surf.idw fills a raster matrix with interpolated values generated from a set of irregularly spaced data points using numerical approximation (weighted averaging) techniques. In comparison with other methods, numerical approximation allows representation of more complex surfaces, restricts the spatial influence of any errors and generates the interpolated surface from the data points. s.surf.idw allows the user to use a GRASS site list file, rather than a raster map layer, as input.

Manual entry for s.surf.idw

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Automatically created on: Wed Mar 30 04:39:03 2005