[gdal-dev] GDAL 1.8.0 and MrSid "no-data" values

[Oyvind Idland]

Hi,

should I assume that this error is due to the DSDK 8.x version ?

-- Oyvind


On Mon, May 16, 2011 at 8:30 AM, Oyvind Idland <oyvind.idland at gmail.com>wrote:

> Hi,
>
> The file I'm using is actually MG2, using only 3 bands.
>
> Note, thats its the same file I used for testing in 1.7.x aswell.
>
>
> - Oyvind
>
>
>
> On Fri, May 13, 2011 at 4:08 PM, Kirk McKelvey <kmckelvey at lizardtech.com>wrote:
>
>> Is this with MG3 or MG4 files?  MG4 uses an alpha channel instead of
>> nodata, so what you describe would be expected in that case.
>>
>>
>>
>> *From:* gdal-dev-bounces at lists.osgeo.org [mailto:
>> gdal-dev-bounces at lists.osgeo.org] *On Behalf Of *Oyvind Idland
>> *Sent:* vendredi 13 mai 2011 04:28
>> *To:* gdal-dev at lists.osgeo.org
>> *Subject:* [gdal-dev] GDAL 1.8.0 and MrSid "no-data" values
>>
>>
>>
>> Hi,
>>
>> I just updated to 1.8.0 from 1.7, using the MrSid DSDK 8.0.
>>
>> In order to handle transparency, i have until now used the metadata values
>> from "IMAGE__NO_DATA_VALUE",
>> and simply masked away pixels.
>>
>> After upgrading, the IMAGE__NO_DATA_VALUE yields nothing, neither is it
>> listed when using gdalinfo.
>>
>> The band->GetNoDataValue() doesn't give me any hints either.
>>
>> Should I handle this in a different way ?
>>
>>
>> -- Oyvind
>>
>
>
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