[gdal-dev] projection error

[y hema]

hi ,
poDataset = (GDALDataset *) GDALOpen( pszFilename, GA_ReadOnly );

    if( poDataset != NULL )
    {
        numBands = poDataset->GetRasterCount();
        width = poDataset->GetRasterXSize();
        height = poDataset->GetRasterYSize();
        GDALRasterBand  *poBand;
        poBands = new GDALRasterBand*[numBands];


        poBand = poDataset->GetRasterBand(1);

        dataType = (GDALDataType)poBand->GetRasterDataType();
        bytesPerPixel =GDALGetDataTypeSize((GDALDataType)dataType)/8;
    }
    const char *ch =   poDataset->GetProjectionRef();
    double *tiepoints = new double[6];
    poDataset->GetGeoTransform(tiepoints);
    for(int i=0;i<6;i++)
    {
        qDebug()<<"tie points"<< tiepoints[0];
    }
    uchar *data;

    data = (uchar *) /*CPLMalloc*/new
char[(sizeof(uchar)*width*height*bytesPerPixel*numBands)];
    int bandIndices[numBands];
    double scale = 5.0;

    for(int j=0 ;j<numBands ;j++)
    {
        bandIndices[j] = j;
    }
    for(int i = 0; i < numBands; i++)
    {
        poBands[i] = poDataset->GetRasterBand(bandIndices[i]+1);
        poBands[i]->SetScale(10);

        poBands[i]->RasterIO(GF_Read, 0, 0, width,
height,data+(bytesPerPixel*i), width, height, (GDALDataType)dataType,
numBands*bytesPerPixel, 0);

    }


actually i am trying to read the projection string and the tie points .the
above is the code im using.

thanks,
hema

On Tue, Sep 8, 2015 at 5:21 PM, Jukka Rahkonen <
jukka.rahkonen at maanmittauslaitos.fi> wrote:

> Hema Yeedunuri <hema.yeedunuri <at> amigooptima.in> writes:
>
> > hi all,
> > i have a geotiff file .i have wrapper classes for gdal for reading and
> writing.gdal version is 1.11 and proj is 4.2 .whe i try to load a file it
> is
> giving following error.i am using ubuntu 12.04.
> > ERROR 1: Only OGC WKT Projections supported for writing to GeoTIFF.
>
> I fear that with that information nobody can solve your issue. The error
> suggests that you are trying to write into GeoTIFF something that is not
> OGC
> WKT Projection. You must tell us what you try to write into GeoTIFF, even
> better if you attach the failing code as well.
>
> You say that you try to load a file and the error says that you try to
> write
> something invalid into a file so perhaps your code does not do what you
> believe it does.
>
> For self-help I believe this is useful
> http://www.gdal.org/osr_tutorial.html
> and probably this also
>
> http://stackoverflow.com/questions/13158795/create-a-geotiff-from-an-existing-bitmap-in-c-sharp-with-gdal
> .
>
> -Jukka Rahkonen-
>
>
>
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
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