Frank, > -------Original Message------- > From: Frank Warmerdam <[EMAIL PROTECTED]> > Subject: Re: [gdal-dev] Fastest way to add the GeoTransform to a raster file > with Python > Sent: Sep 18 '08 16:09 > > On 9/18/08, Matthieu Rigal <[EMAIL PROTECTED]> wrote: > > Hi all, > > Since the method of Create, SetGeoTransform, etc... is "complicated" and > > unefficient from a performance point of view, what is the way to quickly > add > > the GeoTransform, taken from a referenced raster to a raster that have > lost > > the information. > > Matthieu, > > I assume the approach that is complicated is to create a > whole new image with Create(), setting the geotransform on > that and then copying over all the image data. is that what > you mean? > > What format of imagery are you working with? There are > different limitations on different drivers with regard to updating > georeferencing "in place". For for some formats you can just > open a dataset in update mode, and call SetGeoTransform() > to update the georeferencing.
Wouldn't be fair to say that some formats also requires a call to FlushCache() afterwards? > For other formats this is not > possible. > > Some formats support world files with various extensions. For > these formats the easiest approach might be to just manually > write out a world file. > > >From the commandline the easiest way is to use gdal_translate > and the -a_ullr switch though internally this is of course creating > a new dataset and copying everything over. > > Best regards, > -- > > ---------------------------------------+-------------------------------------- > I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED] > light and sound - activate the windows | http://pobox.com/~warmerdam > and watch the world go round - Rush | Geospatial Programmer for Rent > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > Best regards, Ivan _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev