[gdal-dev] GeomTransform in VRT-file

[Dmitriy Baryshnikov]

Hi Jan,

Do you mean this : http://www.gdal.org/gdal_datamodel.html (Affine 
GeoTransform srection) or this http://www.gdal.org/gdal_tutorial.html 
(Getting Dataset Information section)?
Also, see this: 
http://www.gdal.org/classVRTDataset.html#a1531325b71e290b90c8d9cc88bce6c2b

Best regards,
     Dmitriy

04.07.2013 20:12, Jan Hartmann пишет:
> I'm struggling with the order of the Geotransform section in a vrt 
> file. I would like to rotate an image, and computed the six parameters 
> for the affine transformation. I can transform points exactly, using 
> the following formula:
>
> x2 = a.x1 + b.y1 + c
> y2 = d.x1 + e.y1 + f
>
> Can anyone tell me what the order is in the GeoTransform section of 
> the VRT-file?
>
> <GeoTransform> c a b f d e </GeoTransform>
>
> results in an image somewhere in the neighbourhood, but mirrored and 
> translated. What is the order of the parameters a-f?
>
> Jan
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