[Gdal-dev] how to get the right parameters for ECW creation

[Jean-Claude Repetto]

WolfgangZ a écrit :
> Hi,
> 
> how do I get the right -co parameters for the creation of georeferenced 
> ecw files.
> 
> The source is a geotiff with the EPSG code 31285. How do I find out 
> which -co DATUM=???? and -co PROJ=???? I need to use?
> 
> Many thanks
> Wolfgang

Hi,

Look at the files in the GDT_DATA directory of ERMapper, particularly 
datum.dat and project.dat .

For EPSG 27572, I am using -CO 'DATUM=NTF' -CO 'PROJ=LM2FRANC'

Jean-Claude