Hi Edzer,
I am still having some trouble with the great distance calculations in
'variogram'. Your suggestion below works, but the distances are not correct
(at least, not in kilometers, meters, or miles). I do not have proj.4 or gdal
libraries installed, nor do I have the R packages proj4 or
This works great, Edzer. I expected there was a simple solution. Many thanks!
-Tim
On Wed, Apr 2008, 30 at 07:42:36AM +0200, Edzer Pebesma wrote:
> Timothy, for some reason the projected argument was not meant to be set
> by users at this level of abstraction; I'll look into it. The following
Timothy, for some reason the projected argument was not meant to be set
by users at this level of abstraction; I'll look into it. The following
seems to work:
> proj4string(foo)=CRS("+longlat")
> proj4string(foo)
[1] "+longlat"
> variogram(z~1,foo)
np distgamma dir.hor dir.ver i
Hello,
I am trying to use gstat to compute a semivariogram for data whose coordinates
are latitude/longitude pairs. I would like to use the great circle distance
between pairs. The documentation implies that gstat can do this, but I am not
having any success. If anyone could suggest the corr
