Thanks for taking the time to answer.
On 04/24/2013 02:07 AM, Frank Warmerdam wrote:
...
Is the relationship between your images and geographic (lat/long)
coordinate space affine? If so, a geotransform will do just fine.
(ie. is the pixel spacing uniform over the image in terms of decimal
degrees)
If I understand you correctly, it cannot be used for e.g. a lambert
conformal > cartesian (eg. bitmap x,y pixels), because lons are not
parallel and lats are bend when being projected.
regards,
wim
BTW; I want to use GDAL for an OS flight navigation project
(http://openflightnav.org/)
Best regards,
Frank
On Tue, Apr 23, 2013 at 4:37 AM, Wim de Vries <wsvr...@xs4all.nl
<mailto:wsvr...@xs4all.nl>> wrote:
Hi,
I want to go from x,y (pixels) to lon,lat and vice versa, using
geotiffs.
I have found the GetGeoTransform()
<http://www.gdal.org/classGDALDataset.html#af9593cc241e7d140f5f3c4798a43a668>
function, but the documentations says:
"NOTE: GetGeoTransform()
<http://www.gdal.org/classGDALDataset.html#af9593cc241e7d140f5f3c4798a43a668>
isn't expressive enough to handle the variety of OGC Grid
Coverages pixel/line to projection transformation schemes.
Eventually this method will be depreciated in favour of a more
general scheme."
I googled a lot, but cannot find out what is meant exactly by "OGC
Grid Coverages". I am just working with a simple cartesian x,y grid.
Anyone willing to explain a bit more.
Thanks.
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