[gdal-dev] ECW writing (was GTiff optimisation) [SEC=UNCLASSIFIED]

Pinner, Luke Luke.Pinner at environment.gov.au
Wed Aug 31 19:56:04 EDT 2011

Does this apply to the 4.x read-only version of the ERDAS ECW/JP2 SDK as
well as the old 3.3 SDK?

-----Original Message-----
From: gdal-dev-bounces at lists.osgeo.org
[mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Even Rouault
Sent: Thursday, 1 September 2011 9:38 AM
To: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] ECW writing (was GTiff optimisation)

> But the ecwhdr utility that Jean-Claude mentionned is really what you
> want to use, if you indeed just want to alter the projection info
> georeferenced bounds. I thought that there was only a Erdas utility to
> achieve that, cool to see that it can be done with the SDK API. This
> me the idea that the ECW driver could be enhanced to implement the
> SetGeoTransform() and SetProjection() API, as well as some special
> metadata (likely PROJ and DATUM to be consistant with the creation
> options) through SetMetadataItem() to explicitely set the datum and
> projection codes. Then a simple python script could use those new
> capabilities to offer a service equivalent to the one of the ecwhdr
> utility. This would have the advantage of being available through GDAL
> soon as the ECW driver has been compiled. I think I'm going to give it
> try.

Implemented in http://trac.osgeo.org/gdal/ticket/4220 . Tested on Linux

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