[gdal-dev] MEM Datasets

[Chaitanya kumar CH]

James,

You forgot to call GDALAllRegister() before opening the dataset. Then you
will not get a NULL with GDALOpen().
http://www.gdal.org/gdal_tutorial.html

On Tue, Jul 13, 2010 at 3:40 PM, James Meyer <jamesm at lantic.net> wrote:

> Hi
>
> I am trying to use MEM (In-memory) datasets with GDAL.
> However, on trying to close the dataset I get a segmentation fault.
> The dataset is created successfully. The handle returned is valid and I am
> able to read and write to it.
>
> Am I not supposed to try and close the handle or am I doing something else
> wrong?
>
> The code is as follows:
>
> //************************************************
>  char filename[255];
>  int datasize = 100 * 100 * (GDALGetDataTypeSize(GDT_Byte) / 8);
>
>  void* data = malloc(datasize);
>  sprintf(filename,
>    "MEM:::DATAPOINTER=%p,PIXELS=%d,LINES=%d,BANDS=%d,DATATYPE=%s",
> &data, 100, 100, 1, GDALGetDataTypeName(GDT_Byte));
>
>
>  GDALDatasetH dst = GDALOpen(filename,GA_Update);
>  GDALDataset* dest = (GDALDataset*) dst;
>
>  if (! dest )
>  {
>     printf("Failed to open Dataset");
>  }
>  GDALClose(dst); //This fails
>  free(data);
> //**************************************************
>
> Thanks
>
> James
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>



-- 
Best regards,
Chaitanya kumar CH.
/tʃaɪθənjə/ /kʊmɑr/
+91-9494447584
17.2416N 80.1426E
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