Dear list
I have a data set of highly positively skewed.
I tried to use indicator kriging to improve the estimation accuracy over OK.
But I found out some difficulties:
1- The omnidirectional semivariogram show a strong to moderate spatial
correlation whereas indicator semivariograms except for 0.1 and 0.8 quantiles
do not show any spatial correlation.
2- I tried to use some quantiles, which their indicator kriging show a weak
spatial correlation. I run IK with 5 possible cutoffs. The estimation accuracy
goes a little bit higher however the map produced using IK is much smoother
than OK.
I do not know why this happen? And what should I do now?
I really need help. Please let me know your opinion about that.
Best regards
Suzaneh
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