Re: [gdal-dev] resampling techniques in GDAL

2009-07-05 Thread Markus Neteler
On Wed, Jun 17, 2009 at 12:52 AM, Gregory, Matthew wrote: > Hi all, > > A recent post got me thinking about resampling techniques.  I've posted > a graphic to help illustrate my question. > >  http://www.fsl.orst.edu/lemma/sandbox/resample.png > > In the graphic, assume the input image is the 3x3 g

Re: [gdal-dev] resampling techniques in GDAL

2009-06-16 Thread Seth Price
The reason that what you are suggesting isn't done is mainly speed and simplicity. GDAL makes the assumption that you are warping from one resolution to another, similar, resolution. The current scheme works well for that. However, I believe that Cubic Spline and Lanczos resampling both do what yo

Re: [gdal-dev] resampling techniques in GDAL

2009-06-16 Thread Frank Warmerdam
Gregory, Matthew wrote: Hi all, A recent post got me thinking about resampling techniques. I've posted a graphic to help illustrate my question. http://www.fsl.orst.edu/lemma/sandbox/resample.png In the graphic, assume the input image is the 3x3 grid with black outlines and blue and yell

[gdal-dev] resampling techniques in GDAL

2009-06-16 Thread Gregory, Matthew
Hi all, A recent post got me thinking about resampling techniques. I've posted a graphic to help illustrate my question. http://www.fsl.orst.edu/lemma/sandbox/resample.png In the graphic, assume the input image is the 3x3 grid with black outlines and blue and yellow dot centers. Assume the