[R-sig-Geo] Log-normal block krige

[Javier Elio]

Dear all,

I am trying to calculate the average value in a study area. I carried out the sampling according to a grid, and the data are lognormal. I would like to do with block krige (ordinary krige), I do the block krige with logarithms but I don't know how to back-transforming. 

I read Cressie 2006, but I don't know how to do in gstat (or other package, I aslo try constrainedKriging). I use krigeTg to back-transforming the predictions and for gaussian simulations, but as I know it can't be used for block krige. 

Please, can anyone help me? 

Best regards,

Javier de Elío Medina
Universidad Politécnica de Madrid
Escuela de Ingenieros de Minas