GSLIB - History

Log of Changes to GSLIB

This is a log of changes, bug fixes, and new features to the GSLIB programs. The FORTRAN 77 code in the second edition of GSLIB, published by Oxford University Press, is the official version of GSLIB. Since the start of 1998, changes have been made to the official version. The source code of these changes has not been released to the public, although PC executables have been. The source code is reserved for sponsors of the Centre for Computational Geostatistics (CCG). The source code will be released with the third edition planned (tentatively) for 2003.

To summarize the transition from FORTRAN 77 (F77) to FORTRAN 90 (F90):

Changes since 2.905

Date Programs Version
March 16, 2000 locmap 2.906
Feature added to permit symbols with no lines around them. The label option should be set to -1 for this. Of course, that means that one cannot plot a label AND no line at the same time. When there is a reason to skip the line, there are too many symbols for labels.
March 16, 2000 backtr 2.906
Bug determining size of transformation table fixed.
April 25, 2000 sgsim/sisim/sisim_gs/sisim_lm 2.906
Multiple grid search changes. Changed to -imult instead of +imult due to search according to descending order.
April 25, 2000 kt3d  2.906
Changed to use local mean in kriging estimate, that is, option 2 was not fully functional before.
May 1, 2000 kb2d  2.906
Changed to correct Lagrange parameter in calculation of kriging variance and to correct the use of range parameter in exponential and Gaussian variogram models.
May 9, 2000 All with grid output  2.907
Modified programs that output a grid to write nx/ny/nz after "nvar" specification on the second line of the output file.
May 10, 2000 ik3d   
Modified to handle kriging with one grid node.