I am attempting to krige a very large 2D region using the geoR package (http://cran.ssds.ucdavis.edu/). The geoR kriging works well for regions that have stationary data. My big region has areas where the trend and possibly the variogram changes. Because of this I am trying to split up the big region into smaller regions that have more stationary data so that I can krige each region separately. The problem I'm having is that sub-regions that are too small have too little data to make a good variogram. I need to choose the correct size sub-region. My total region is very big and need to automate the process. Is there R software out there that will help with this? Is there a way to choose the size of the subregion in a systematic and logical way?
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