Geostatistical capabilities available in TerrSet use the Gstat software package accessed through TerrSet interfaces.
Gstat is a program for geostatistical modeling, prediction and simulation (Copyright 1992, 1998 by Edzer J. Pebesma). The Gstat program is free software and can be redistributed and/or modified under the terms of the GNU General Public License as published by the Free Software Foundation. Information about the original source code and documentation of Gstat are available at http://www.gstat.org
In accordance with the GNU license, the Clark Labs modifications to the Gstat source code are available as a free download:
See Clark Labs Modified Gstat Code to view the text description of the changes made to the Gstat code.