[Gstat-info] non-Euclidean distance functions?

[Carlos Rueda]

Hello list,

I'm just starting to look into gstat to see the feasibility of
incorporating user-defined distance functions to compute models and do
interpolation. I already searched the gstat-info archives but it seems
this aspect hasn't been discussed here. I'm not an expert in
geostatistical analysis but, according to some references(*), it would
be sufficient that the distance function be a valid metric. Is this
correct? If so, can anyone provide some hints regarding the parts in
the source code that would have to be modified? (I already have
glanced over the code and have a preliminary approach that I can
discuss off-list.)

   (*) - http://www.mail-archive.com/ai-geostats@jrc.it/msg03008.html
        - A geostatistical approach for describing spatial pattern in
stream networks.
          Ganio, Torgersen, Gresswell. Frontiers in Ecology and the
Environment. 2005

Thanks!

Carlos Rueda
Postdoctoral Researcher
Center for Spatial Technologies and Remote Sensing
University of California, Davis