[R-sig-Geo] Anisotropy for Cokriging

[Seyed Jalil Alavi]

Dear All
​
I am mapping forest site productivity for one of most important species in 
one of the oldest forests in the world, Hyrcanian Forests, Iran.
 
Dear All, I used rose plot function written by Jon Graham 
(http://www.math.umt.edu/graham/stat544/) and found there is an anisotropy 
in the variogram for kriging and I included the anisotropy in variogram 
fitting.

Dear All, I want to investigate the anisotropy for cokriging and if there is 
anisotropy, I want to consider it for cokriging.

I search many textbooks and also in the internet and found NOTHING for 
anisotropy for cokriging.
I would be very grateful if ANYONE can help me how can I study the 
anisotropy for cokriging and include it the model.

 Another question is about argument cressie=T in gstat package. For krige 
function in gstat package there is cressie=T, if there are outliers. For my 
data, it seems there are some outliers and I want to include cressie=T for 
variogram for fitting cokriging. I did not see any argument in gstat 
function.

I would be extremely grateful for any help

Thanks and regards

Jalil

**********************************
Seyed Jalil Alavi, Ph.D
Assistant Professor in Statistical Ecology
Dept. of Forestry
Faculty of Natural Resources
Tarbiat Modares University
P.O.Box 46417-76489
Noor
Mazandaran
Iran
Mobile Phone Number 00989111580097
Tel:0098(122)6253101-3
http://www.modares.ac.ir/en/Schools/nat/Academic_Staff/~j.alavi
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