Re: [R-sig-Geo] maximum likelihood variogram parameter estimation, non-Euclidian distances

2010-07-15 Thread Facundo Muñoz
Hi Tim, I have been in a similar situation, and modified some functions in geoR in order to fit variograms, and perform kriging with non-Euclidean distances. In particular, you can use likfit() and get maximum-likelihood estimates for variogram models with non-Euclidean distances. You can get

Re: [R-sig-Geo] maximum likelihood variogram parameter estimation, non-Euclidian distances

2010-07-15 Thread Edzer Pebesma
On 07/15/2010 01:24 AM, Timothy W. Hilton wrote: > Hello R-sig-Geo list, > > I want to calculate maximum likelihood estimations for variogram > parameters (sill, range). My data locations span North America, thus I > believe that UTM coordinates (or any other projection) will distort > distance

[R-sig-Geo] maximum likelihood variogram parameter estimation, non-Euclidian distances

2010-07-14 Thread Timothy W. Hilton
Hello R-sig-Geo list, I want to calculate maximum likelihood estimations for variogram parameters (sill, range). My data locations span North America, thus I believe that UTM coordinates (or any other projection) will distort distances between sites too much for me to use Euclidian coordinates.