hello list, to get the global mean of my data set (484 observation wells) and as a prerequisite for Normal Score Transformation with GSLIB, i declustered my data with polygonal declustering. When standardizing the weights to 1, so that the weights sum up to the number of data, I receive some negative weights. this results in negative values for the observations (nitrate concentration). how do i have to interpret this ? does this require a special treatment? skip them? as I mentioned before, i want to normal score transform the data set prior to simple kriging. many many thanx for some help in advance. Regards, Oliver
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