[gdal-dev] java Dataset.GetRasterBand(i).ComputeRasterMinMax not working for float data

[mccorb]

I have a geotiff image with float data (GDT_Float32).  When I read a tile I
have to case the nodata value to float to make it compare otherwise it
doesn't...here is a reduced snippet of my code

Double[] d = new Double[1];
rb.GetNoDataValue(d);
double noDataVal = d[0];
...
if(rasterBandDataType == gdalconstConstants.GDT_Float32)
{
    float[] array = new float[(rect.height * rect.width)];
    int retVal = rb.ReadRaster(rect.x, rect.y, rect.width, rect.height,
rasterBandDataType, array);
   * float noDataValCast = (float) noDataVal;*
    for(int i = 0; i < array.length; i++)
    {
        if(noDataValCast == buff[i])
            array[i] = Double.NaN;
        else
            array[i] = (scale * buff[i]) + offset;
    }
}

If I don't cast the noDataVal to a float then the value in the returned
array doesn't equal the noData value 
returned from the raster band. 

It seems as though the ComputeRasterMinMax call has the same issue as I was
having before I did the casting. I definitely want to use this method it
because it is much faster than pulling the tiles and processing them myself.

I can provide the geotiff file. It is ~100m and wouldn't upload






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