[gdal-dev] Unable to write in subdataset
Chaitanya kumar CH
chaitanya.ch at gmail.com
Tue Jul 19 23:30:28 EDT 2011
Derek,
Why are you trying to write to the dataset after opening it as GA_ReadOnly?
On Wed, Jul 20, 2011 at 4:25 AM, Cole, Derek <dcole at integrity-apps.com>wrote:
> Hello,
>
> I have created an image with multiple subdatasets so that I may store two
> images in my NITF. the way I am getting the data set of the second image is
> like so:
>
> char **papszSubdatasets = GDALGetMetadata(sharpenedDS,"SUBDATASETS");
> eraserDS = (GDALDataset *)
> GDALOpenShared(CSLFetchNameValue(papszSubdatasets, "SUBDATASET_2_NAME") ,
> GA_ReadOnly );
> eraserBand = eraserDS->GetRasterBand(1);
>
> (this is after checking to make sure that the first DS has more than one
> subdataset)
>
> According to CPL_DEBUG, the GDALOpenShared works correctly and opens the
> file as NITF.
>
> However, at some points in my code, I am getting this thrown to console
> presumably where I am using the band's RasterIO method to GF_Write.
>
> ERROR 3: Unable to write 2097152 byte block from 8302649793.
> ERROR 1: An error occured while writing a dirty block
>
> What do these error messages mean? I mam getting a ton of them. the block
> is the same number of bytes, but the "from" changes in each instance of the
> error.
>
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>
--
Best regards,
Chaitanya kumar CH.
+91-9494447584
17.2416N 80.1426E
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