
Hi Don, sorry about de delay,

Don MacQueen escribió:
> Facundo,
>
> I am interested in essentially the same thing, though my application 
> is inside buildings. I am wondering what technique(s), software, etc. 
> you would be using to calculate your distances.
well, in fact i didn't face the problem yet, (i will soon) but i'm 
pretty sure it can be well done with GRASS GIS, specifically r.cost. 
<http://grass.itc.it/grass63/manuals/html63_user/r.cost.html>
It is very flexible, and in particular allows to define (trough raster 
maps) barriers (walls). It finds the minimum-cost distance between points..
> I asked about this about a month ago, here on r-sig-geo, and received 
> some helpful replies. The subject line at that time was
>    [R-sig-Geo] Shortest path around obstacles (OT)
Yes i remember, sorry i didn't answer: i thought you wanted to do than 
inside R
I hope this helps.

    Facundo.-

-Don

At 7:05 PM +0100 3/20/08, Facundo Muñoz wrote:
> Hello All,
>
> I'm performing  regression kriging (using both gstat and geoR)  in an
> urban environment. Thus, i have discontinuities (buildings) in the
> prediction space which make distances to be non-euclidean.
>
> I need to estimate variogram and make predictions using distances
> calculated by myself and passed to the algorithms (say, in a distance
> matrix), instead of letting them calculate distances based on 
> coordinates.
>
> ¿Has anyone faced this issue before?
>
> Thanks in advance,
>     Facundo Muñoz
>
> -- 
> Departament d'Estadística i Investigació Operativa Universitat de
> València (Estudi General)
> Facultat de Matemàtiques, Dr. Moliner 50, 46100 Burjassot, Spain.
> (+34) 96 354 3987, fax: (+34) 96 354 3238
> e-mail: Facundo.Munoz@uv.es, web: http://www.uv.es/~famarmu/
>
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