[Gdal-dev] gdalwarp resampling

[Frank Warmerdam]

Ray Joslyn wrote:
> Hello,
> 
> Regarding gdalwarp and the –rn, -rb, -rc switches.  I do not see any 
> difference in the output images when using these different resampling 
> methods.  Is there something else required here to get the resampling to 
> work?

Ray,

Are you actually doing any change in image geometry?  A gdalwarp to a file
with exactly the same size and geometry *should* result in no image change.
Also, be sure you have the gdalwarp version that supports these switches.
Do they show up in the usage message?

Other than that they should be subtly different in normal usage.

Best regards,
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