Hello all. I'm performing unconditional sequential indicator simulation over a 3D domain. As the method requires, I have specified the data cdf at (10) thresholds, and have also defined parameters for an (exponential) variogram at each threshold. When I run the simulation algorithm using simple kriging to estimate the cdf at each threshold for each node, the method works great, i.e., I am able to approximatley reproduce the domain cdf and variograms. However, when I use ordinary kriging, the method falls apart. It seems that reproduction of the domain cdf becomes 'blocky' and looses its smoothness. I have made the search ellipsoid very large and allowed the number of data points that can be used for the OK to be very large, but the results are always poor. Does anyone have any suggestions about what is happening with the OK? I am using GSLib software. Thanks to all!
Eric Bhark
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