[gdal-dev] gdalwarp -tps

[Jan Hartmann]

The -tps option can only be used with control points added to an 
unreferenced raster. It's done this way:

gdal_translate \
     -gcp scanx1 scany1 worldx1 wordy1     \
      -gcp scanx2 scany2 worldx1 worldy1   \
     ... etc \
in.tif out.tif

gdalwarp -tps out.tif world.tif

A georeferenced raster cannot have additional control points, so you can 
not warp it further with -tps. The only way to use thin plate spline 
interpolation is to compute the control points in the original scan 
coordinate sytem. Not very easy!

Jan

On 29-8-2013 17:14, laura0 wrote:
> Hi André,
> my geotiff is already georeferenced (yes I used gdaltranslate previously)
> and also projected. I would like to know how thin plate spline interpolation
> works using the -tps gdalwarp option.
>
> Regards,
> Laura
>
>
>
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