Paul, Please check that you used the right values for XSize and YSize.
On Wed, Jun 22, 2011 at 6:39 PM, Paul Mallas <[email protected]>wrote: > Yes, I tried this. I keep getting a segmentation fault doing it this way. > > I will dig further, maybe something else is not right. > > Regards, > Paul > > > On 6/17/2011 6:25 PM, Paul Mallas wrote: > >> On 6/17/2011 5:41 PM, Frank Warmerdam wrote: >> >>> On 11-06-17 03:23 PM, Paul Mallas wrote: >>> >>>> Hello, >>>> >>>> I am trying to transpose image data (i.e., swap lines and columns) >>>> and am >>>> struggling to make it work properly. I think this should be possible >>>> through >>>> RasterIO, but so far no luck. Any suggestions? >>>> >>>> My approach so far has been like this, with image nXsize by nYsize: >>>> >>>> void *pData = VSIMalloc2(nXSize, (GDALGetDataTypeSize(eType) / 8)); >>>> >>>> for (int iLine = 0; iLine < nYSize; iLine++) { >>>> >>>> // Read in row (line) >>>> eErr = poSrcBand->RasterIO(GF_Read, 0, iLine, nXSize, 1, pData, >>>> nXSize, 1, eType, 0,0); >>>> >>>> // Now I want to write a column, nothing I tried here has worked >>>> eErr = poDstBand->RasterIO(GF_Write, ....... >>>> >>> >>> Paul, >>> >>> You should be able to write this column wise like: >>> >>> poDstBand->RasterIO( GF_Write, iLine, 0, 1, nXSize, >>> pData, 1, nXSize, eType, 0, 0 ); >>> >>> Note that this can be pretty inefficient depending on the format and >>> how it is blocked. >>> >>> Best regards, >>> >> >> Hmm, I thought I tried this configuration. I will try again. Thank you >> for your time Frank. >> > > > ______________________________**_________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/**mailman/listinfo/gdal-dev<http://lists.osgeo.org/mailman/listinfo/gdal-dev> > -- Best regards, Chaitanya kumar CH. /tʃaɪθənjə/ /kʊmɑr/ +91-9494447584 17.2416N 80.1426E
_______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
