[gdal-dev] several No data value

[Frank Warmerdam]

Ludovic Mercier wrote:
> Hi,
> 
> i work with a type of data wich can have : no data value and other 
> information like "low and hight instrument saturation". For many 
> algorithm this value (instrument saturation ) is like "no data value".
> But in gdal doc only one data value is managed.
> Have you a solution for this case ?
> 
> A practical exemple is :
> data is REAL typically [-2E-5, 2E-5]
> no data value is -1004
> instrument saturation is -1001
> 
> thanks by advance for yours suggestions.

Ludovic,

GDAL only supports single nodata values as part of the data model.  You
can add arbitrary metadata describing other nodata values, but generally
GDAL itself and other client software won't realize the significance of
these other values.

sorry!

Best regards,
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