[Gdal-dev] CreateCopy does not copy the NoData value info

[Julien Fiore]

Frank,

Sorry, my question was incomplete. The NoData value is converted into the new geotiff, I
checked it with band.GetNoDataValue(). The problem is that ESRI ArcGIS 9.0 does not
recognize the NoData value. When I look at the geotiff properties in ArcCatalog, the
NoData field is empty. Is it an ArcGIS bug ?

Julien


-----Message d'origine-----
De : Frank Warmerdam [mailto:fwarmerdam at gmail.com] De la part de Frank Warmerdam
Envoyé : vendredi, 24. mars 2006 16:45
À : Julien Fiore
Cc : gdal-dev at lists.maptools.org
Objet : Re: [Gdal-dev] CreateCopy does not copy the NoData value info

Julien Fiore wrote:
> Dear gdal users,
> 
> I'm using Python and gdal to process raster data.
> I open the input raster (an Arc/Info Binary Grid (.adf)) and use 
> driver.CreateCopy to create the output raster (a GeoTIFF). Everything 
> works except that the resulting GeoTIFF is not aware of the NoData 
> value, which was specified in the input file. I tried to specify it with the
band.SetNoDataValue command but it does not change anything.
> 
> Do you know how to resolve this problem ? 
> Any help would be very welcome.

Julien,

I tried a translation from Arc/Info Binary Grid to GeoTIFF just now and it preserved the
nodata value.  How did you verify that the nodata value was missing in the GeoTIFF?  What
version of GDAL are you using?

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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