Ian
From: Even Rouault [even.roua...@spatialys.com]
Sent: Tuesday, 26 June 2018 12:21 a.m.
To: gdal-dev@lists.osgeo.org
Cc: Ian Reese; Jeremy Palmer
Subject: Re: [gdal-dev] Kriging Interpolation
Ian,
Looking at your script, for the IDW, I see you don't use the max_points, nor
the radius1 a
Cheer Joakim! That I am not familiar with and will have a look
From: Joaquim Manuel Freire Luís [jl...@ualg.pt]
Sent: Tuesday, 26 June 2018 10:58 a.m.
To: Ian Reese; Even Rouault; gdal-dev@lists.osgeo.org
Cc: Jeremy Palmer
Subject: RE: [gdal-dev] Kriging
I have plenty of methods for working around speed issues and have
|>worked with any number of interpolations methods in GRASS, SAGA and
|>Python.
You have also the minimum curvature in GMT. Not lightning fast but quicker than
krigging and normally better looking, specially on the extrapolation
uault [mailto:even.roua...@spatialys.com]
Sent: Tuesday, 26 June 2018 12:21 a.m.
To: gdal-dev@lists.osgeo.org
Cc: Ian Reese; Jeremy Palmer
Subject: Re: [gdal-dev] Kriging Interpolation
Ian,
Looking at your script, for the IDW, I see you don't use the max_points, nor
the radius1 and radius2 to
Ian,
Looking at your script, for the IDW, I see you don't use the max_points, nor
the radius1 and radius2 to limit the neighbourhoud into which the points are
searched.
For the linear search, I've profiled the run and found that an enormous amout
of time was spent processing the points outside
Hi Ian,
If you find IDW on N points slow, you will find Kriging on the same number
of points unbearably slow, since for Kriging you will have to solve a
system of N linear equations (essentially inverting an NxN matrix) to
compute the Kriging weights. To set up the matrix you will even need to
com
For what is worth, as an end-user of GDAL, I would be very interested in
having such capacity in GDAL.
Cheers
Chris
On 24 June 2018 at 21:19, Ian Reese wrote:
> Hi Gdal,
>
> I'd like to know if it is possible to make Kriging Interpolation part of
> gdal_grid. We work with a good deal of scatt
Hi Gdal,
I'd like to know if it is possible to make Kriging Interpolation part of
gdal_grid. We work with a good deal of scattered point elevation data and
neither IDW or Linear interpolations(smooth or not smooth) produce the desired
visual results. Nor are they fast enough for the density
