[Qgis-developer] World file and Georeferencer

[Manuel Massing]

Hi Agus,

> I often need a world file including rotation, would it be possible
> that the Georeferencer plugin had the option of writing a world file
> for order 1 polynomial? (perhaps it is possible  for Helmert also, as
> the scaling could be done by modifying the resolution?).
> 
> Also, what do you understand by Linear? As far as understand, Helmert
> and order 1 polynomial are linear also.

yes, 1st order polynonmials and the 2D helmert transform are linear 
transforms, so this would be possible.

World-file export is currently not enabled for helmert+1st order because
rotated world-files are not always well-supported, even by qgis. It would be
quite bad to create files which are not supported by the originating
application.

But maybe rotated imagery works better with the new accelerated warping code?

bye,

	Manuel
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