[Gdal-dev] Strange NoData value from a MrSID image

Frank Warmerdam fwarmerdam at gmail.com
Wed Jun 22 10:33:09 EDT 2005


On 6/22/05, Peng Gao <pgao at esri.com> wrote:
> GDAL returns a strange NoData value (-1.2197742815800439e-012) from
> one of my mrSID images. The image is 8-bit and has 3 bands.

Peng, 

Have you checked the image with mrsidinfo to see if that value
is what the mrsid internals also report?  Can you supply an example
file?  Some formats use impossible nodata values to indicate that
there is no nodata value.  Perhaps such a bogus value was carried
into a Mrsid file. 

Best regards,
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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and watch the world go round - Rush    | Geospatial Programmer for Rent



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