The Solid Earth Physics group 

Part of Climate and Computational Geophysics, Niels Bohr Institute, University of Copenhagen 
 

VISIM  Volume Average Integration Simulation[pdf] Sequential simulation for linear inverse problems, Computers and Geosciences 34(1), pp 5376, doi:10.1016/j.cageo.2007.02.003.DownloadVISIM 1.5 (January 2009): [tgz] [zip]
The latest source code can be downloaded using SVN:
Manual : [pdf]
Using VISIMVISIM should feel familiar to anyone who has used GSLIB, as it is based on GSLIB code. A Matlab interface to VISIM is available through the mGstat toolbox. Documentation for using the Matlab interface can be found here. AboutVISIM is an acronym for Volume Integration SIMulation. VISIM is the groups first attempt to merge features of geostatistics and linear inverse theory into one complete theory. For geostatisticians : VISIM allow sequential simulation conditioning to noisy linear volume averages measurements of the underground. (for example as in xray tomography). Both sequential Gaussian simulation and direct sequential simulation with histogram reproduction are supported.
The work is a collaboration between Andre Journel, Albert Tarantola, Klaus Mosegaard, Thomas Mejer Hansen and Yongshe Liu.  
