[OSGeo-Discuss] C++ library for "gridding"
jachym.cepicky at centrum.cz
Tue Oct 17 02:23:20 EDT 2006
On Mon, Oct 16, 2006 at 11:14:26PM -0400, Frank Warmerdam wrote:
> Rob Agar wrote:
> >I have some elevation data in the form of a list of sampled points that
> >I would like to convert into a regular grid. Rather than writing my own
> >code for doing this, I was wondering if there is a C++ library for doing
> >this kind of transformation? (eg does OGR do this?)
> >The data is comma separated longitude, latitude and elevation.
> >Any advice, pointers, links to tutorials etc much appreciated - I'm new
> >to GIS, and the learning curve is steep!
> There are several algorithms for this in GRASS I believe. Search GRASS
> for Kriging and inverse distance interpolators and you should find some
> GDAL/OGR does not include an algorithm for point interpolation, though
> OpenEV does have one (simple inverse distance I think) that I have
> contemplated porting to GDAL/OGR.
> Best regards,
as Frank pointed out, GRASS is the tool you are searching for. GRASS
has no direct support for Kriging, but it is possible to provide this
via R package or gstat.
GRASS's modul v.surf.rst is the module, which works for most data the
best. See  for details.
e-mail: jachym.cepicky at centrum.cz
Department of Geoinformation Technologies
613 00, Brno
e-mail: xcepicky at node.mendelu.cz
Tel.: +420 545 134 514
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