[STATSGRASS] problem with kriging not solved but new qestions arise

[Jarek Jasiewicz]

Jarek Jasiewicz napisał(a):
> I try to krige some data, I do following grass wiki tutorial (that 
> with gaiciture)
>
/cut


Jarek Jasiewicz napisał(a):
> I try to krige some data, I do following grass wiki tutorial (that 
> with gaiciture)
/cut


 > And I recive the error:

 > Error in predict.gstat(g, newdata = newdata, block = block, nsim = 
nsim,  :
 >  data items in gstat object and newdata have different coordinate
 > reference systems


After 20 hours of fighting with R I partially solved that problem 
removing projection information (proj4) from both spatial data frames (I 
set roj4string:Formal class 'CRS' [package "sp"] with 1 slots
  .. .. ..@ projargs: chr NA)

And all works well

so - projection information (EPSG 2173 - Polish, 1965 zone IV) makes 
problem?
 why?
or eny projection makes problem - in fact, tutorial data has no proj4 
information

mayby sombody know???
 regards
Jarek