[gdal-dev] GDALComputeRasterMinMax Error

[Chaitanya kumar CH]

RSyaoxin,

Check if poBand->GetNoDataValue() is actually returning a nodata value. If
your raster has an out of range nodata value, there is going to be a
problem. poBand->SetNoDataValue(nodata) will unset the nodata value if the
nodata variable is out of range.

On Tue, Jul 12, 2011 at 7:48 PM, RSyaoxin <RSyaoxin at hotmail.com> wrote:

> Hi,all
>       I have a 32-float image with much "NoDatavalue",and I want to get the
> minimum value and maximum value.Here is my code:
>
>       int         bGotMin, bGotMax;
>       double      adfMinMax[2];
>
>       double nodata=poBand->GetNoDataValue();
>       poBand->SetNoDataValue(nodata);
>       adfMinMax[0] = poBand->GetMinimum( &bGotMin );
>       adfMinMax[1] = poBand->GetMaximum( &bGotMax );
>       if( ! (bGotMin && bGotMax) )
>          GDALComputeRasterMinMax(poBand, FALSE, adfMinMax);
>
>      The maximum value(34.3386) I obtained that is right,but the minimum
> value is -1.#INF,not -61.990734.  -61.990734 is what I want results. That's
> Why?I hope to get some help.
> Thank you!
> Kind regards.
>
> --
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-- 
Best regards,
Chaitanya kumar CH.

+91-9494447584
17.2416N 80.1426E
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