Thank you for pointing out these references.
Best regards, Sebastian -- Dr. Sebastian Bullinger Department Object Recognition Fraunhofer Institute of Optronics, Sytem Technologies and Image Exploitation IOSB Gutleuthausstr. 1, 76275 Ettlingen, Germany Phone +49 7243 992-197 sebastian.bullin...@iosb.fraunhofer.de<mailto:sebastian.bullin...@iosb.fraunhofer.de> www.iosb.fraunhofer.de<https://webmail.iosb.fraunhofer.de/owa/redir.aspx?C=GM65JhP8Gk6mqlokIktWtqcWz_hm-dIIiaYxp7LDE5w39h4r54rwzTEQR1dXSKQtdNkO601Flpk.&URL=http%3a%2f%2fwww.iosb.fraunhofer.de%2f> ________________________________ From: Even Rouault <even.roua...@spatialys.com> Sent: Thursday, March 25, 2021 7:15:52 PM To: Bullinger, Sebastian; gdal-dev@lists.osgeo.org Subject: Re: [gdal-dev] Computing a geo-transform with gdalwarp from a set of GCPs also rectifies the input images If it is not possible to get this information, could you point out the code snippet that performs the rectification step? Since GDAL's code base is quite large, it is not easy to find the appropriate location. Entry point of the logic to compute the transformation from source pixel coordinates to target pixel coordinates https://github.com/OSGeo/gdal/blob/master/gdal/alg/gdaltransformer.cpp#L1380 And in the first step of this transformation, when using polynomial adjustment of GCPs, you'll use: https://github.com/OSGeo/gdal/blob/master/gdal/alg/gdal_crs.cpp Even -- http://www.spatialys.com My software is free, but my time generally not.
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