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OK, thanks a lot for the information.<br>
<br>
Best regards,<br>
Julien<br>
<br>
<div class="moz-cite-prefix">On 05/24/2013 03:48 PM, Frank Warmerdam
wrote:<br>
</div>
<blockquote
cite="mid:CA+YzLBc4G5-V9k+mNyeePjiqros9UwxohUfQyCHJF5TeuoL31A@mail.gmail.com"
type="cite">
<div dir="ltr">Julien,
<div><br>
</div>
<div>I am not aware of any existing way to do this. I might be
nice if an OGR VRT could apply something like this on the fly,
but that doesn't exist currently.</div>
<div><br>
</div>
<div style="">Best regards,</div>
<div style="">Frank</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Fri, May 24, 2013 at 3:04 AM, Julien
Malik <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:julien.malik@c-s.fr" target="_blank">julien.malik@c-s.fr</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
Is it possible to apply an on-the-fly affine transform to an
OGR dataset with the help of VRT ?<br>
Could not find any help or mailing list message about
this...<br>
<br>
The source of the issue is we want to display in QGIS a
non-georeferenced raster with an associated GML mask, where
the coordinates in the mask are in pixel indices, relative
to the raster (X and Y coordinates are unsigned integers).<br>
When loading those two layers as-is in QGis, the raster is
correctly displayed (north up, south down) but the GML mask
is inverted, with a symmetry around the Y axis (Y
coordinates interpreted as south->north when Y
increases). We would like the GML mask to be overlayed on
the raster, so applying "f(Y)=-Y" on the coordinates would
do the trick.<br>
Any other idea to cope with this issue would be appreciated.
We asked on qgis-users and still no luck.<br>
<br>
Thanks in advance,<br>
Julien<br>
<br>
<br>
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-- <br>
---------------------------------------+--------------------------------------<br>
I set the clouds in motion - turn up | Frank Warmerdam, <a
moz-do-not-send="true" href="mailto:warmerdam@pobox.com"
target="_blank">warmerdam@pobox.com</a><br>
light and sound - activate the windows | <a
moz-do-not-send="true" href="http://pobox.com/%7Ewarmerdam"
target="_blank">http://pobox.com/~warmerdam</a><br>
and watch the world go round - Rush | Geospatial Software
Developer<br>
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