[gdal-dev] Kakadu Jpeg2000 driver

[Tamas Szekeres]

This sounds like a driver specific problem. Do you have some test data to
reproduce this?

Best regards,

Tamas



2011/11/2 Livneh Yehiyam <yehil at rafael.co.il>

>   Hi****
>
> I'm trying to use the Kakadu Jpeg2000 (JP2KAK) driver to read raster data.
> ****
>
> I'm working on windows7 64 bit with gdal source version 1.8.1****
>
> ** **
>
> I've compiled the Kakadu SDK version v6.0 (v6_0-00828N), and compiled Gdal
> with the driver enabled. I'm using the c# binding.****
>
> ** **
>
> I can open the dataset, and everything looks ok (size, number of
> overviews, band count etc.).****
>
> When I read data from one of the bands at the base resolution (lets say it
> is 512x512) I get the correct data.****
>
> Band mainBand = dataset.GetRasterBand(1);****
>
> mainBand.ReadRaster(0,0,512,512,buffer,512,512,DataType.GDT_Byte,4,2048);*
> ***
>
> ** **
>
> If I get one of the overview bands:****
>
> Band overviewBand = mainBand.GetOverview(0);****
>
> ** **
>
> And I try to read the entire band (lets say it is 256x256):****
>
>
> overviewBand.ReadRaster(0,0,256,256,buffer,256,256,DataType.GDT_Byte,4,1024);
> ****
>
> What I get in the buffer are the first 256x256 pixels of the mainBand.****
>
> This is contrary to the behavior I'm used to get when reading GTiff files,
> or even JPEG2000 with the JP2ECW driver.****
>
> ** **
>
> Is this behavior by design, or is there another way to achieve what I want.
> ****
>
> ** **
>
> Thanks****
>
> Yehiyam****
>
> ** **
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