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<div class="moz-cite-prefix">On 4/30/2015 1:58 PM, Bischof, Richard
wrote:<br>
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cite="mid:E921652A87CECB488EC72D3ABE4103CF2DB6C5@LV-MX-12102.LV.ads.niedersachsen.de"
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<pre wrap="">Hello,
I have a number of scanned aerial images in .ecw-format, which have to be georeferenced, using eww-file.
How can I calculate the eww-file using multiple passpoints and transformation types like linear or polynomial? </pre>
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<br>
AFAIK, you cannot use a world file for any high order transforms,
only an affine transform.<br>
<br>
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cite="mid:E921652A87CECB488EC72D3ABE4103CF2DB6C5@LV-MX-12102.LV.ads.niedersachsen.de"
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<pre wrap="">
Is there any open source tool,I can use? gdal_warp doesn't seems to be used to that.</pre>
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On the contrary, that is exactly what gdalwarp does. With
gdal_translate you embed your ground control points into the raster,
then use gdalwarp to do the transform. The '-r' option allows to
choose the resampling method, or '-order' to choose the polynomial
order for the transform. <br>
<br>
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cite="mid:E921652A87CECB488EC72D3ABE4103CF2DB6C5@LV-MX-12102.LV.ads.niedersachsen.de"
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<pre wrap="">
Thanks, Richard
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</pre>
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