[gdal-dev] gdal_translate segfault with large netCDF

[Nikolaos Hatzopoulos]

What kind of netcdf file is causing the problem? is a netcdf4 or netcdf3
file?

there is a compiling option in netcdf4  --enable-netcdf-4


On Tue, Apr 19, 2011 at 11:35 AM, Kyle Shannon <ksshannon at gmail.com> wrote:

> Josh,
> As frank said, file a ticket and provide the output of ncdump -h
> yourfile.nc with the ticket.  I will take a look at it as soon as I can,
> although I am pretty busy.  Thanks.
>
> kss
>
> /**
>  *
>  * Kyle Shannon
>  * ksshannon at gmail.com
>  *
>  */
>
>
>
>
> On Tue, Apr 19, 2011 at 09:57, Frank Warmerdam <warmerdam at pobox.com>wrote:
>
>> On 11-04-19 05:01 AM, Josh.Vote at csiro.au wrote:
>>
>>> Hi,
>>>
>>> I’m new to GDAL so please forgive any glaring ignorance J
>>>
>>> Currently I have an 8GB ER Mapper (ERS) dataset that I want to convert to
>>> a
>>> NetCDF file with gdal_translate which always results in a segfault when
>>> using
>>> the following command.
>>>
>>> gdal_translate -of netCDF input.ers output.nc
>>>
>>> Whereas translating only a small <4B subset of the dataset works fine.
>>>
>>> Now I’ve been doing a bit of reading and I know that netcdf 3.6.2 and
>>> below
>>> doesn’t support variables greater than 4GB however I’ve been doing the
>>> translations with the Debian libnetcdf6 package (which I believe includes
>>> netCDF 4.1.1 and running ‘ncgen –version’ confirms this). I am operating
>>> under
>>> the impression that netCDF 4.1.1 should be able to handle netCDF files of
>>> this
>>> size without trouble.
>>>
>>> Now I’ve tested gdal_translate from a variety of builds and they all
>>> produce
>>> the same problem
>>>
>>
>> Josh,
>>
>> I don't see any immediately obvious problems in the way we call the netcdf
>> API in netcdfdataset.cpp's CreateCopy method.  I would suggest you file a
>> ticket on the issue, and a developer can try to reproduce the problem.
>>
>> I would like to suggest that you do a gdal_translate from a subset of the
>> ERS file at the bottom right corner of the source just to ensure that it
>> isn't a problem with reading past the 4GB mark in the ERS file.
>>
>> I seem to have 3.6.3 of the netcdf library so I can't trivially check
>> this on my system.
>>
>> Best regards,
>> --
>>
>> ---------------------------------------+--------------------------------------
>> I set the clouds in motion - turn up   | Frank Warmerdam,
>> warmerdam at pobox.com
>> light and sound - activate the windows | http://pobox.com/~warmerdam
>> and watch the world go round - Rush    | Geospatial Programmer for Rent
>>
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