[gdal-dev] Why not netCDF output?

[Joaquim Luis]

Thanks Even,

I think that's the second time you explain me that (sorry, an easy thing 
to forget), but the docs could be a bit clearer about this. For example

*--formats*
    List all raster formats supported by this GDAL build (read-only and
    read-write) and exit. The format support is indicated as follows:
    'ro' is read-only driver; 'rw' is read or write (ie. supports
    CreateCopy); 'rw+' is read, write and update (ie. supports Create).

so I though the + was for updating


A second point is that the command I used shows a bug in gdalwarp. In 
that the "lixo.grd" is a grid extracted from one the etopo_something 
(actually a regrid version created by me) saning [-180 180] [0 90] and 
the bug is that at dateline there is a stripe of nodata.
Since the grid is too big to post in a ticket, can you please try to 
reproduce this?

Joaquim

> Joaquim,
>
> The valid formats for the output of gdalwarp are formats that support the
> Create() method, not just the CreateCopy() method. This is indicated by (rw+)
> : the + indicates that Create() is supported.
>
> The difference between Create() and CreateCopy() is mainly that Create() allows
> writing of pixel data in random order, which is needed by gdalwarp.
>
> You can try in 2 steps :
> 1) gdalwarp -of VRT lixo.grd [other_options] temp.vrt
> 2) gdal_translate -of netCDF temp.vrt proj.grd
>
> Best regards,
>
> Even
>
>    
>> Hi
>>
>> While running this command
>>
>> gdalwarp -s_srs +proj=latlong -t_srs "+proj=ortho +lon_0=-42 +lat_0=40
>> +ellps=WGS84" -of netCDF lixo.grd proj.grd
>>
>> I get
>>
>> Output driver `netCDF' not recognised or does not support direct output
>> file creation.  The following format drivers are configured
>> (a format list where netCDF is not listed)
>>
>> but if I ask gdalwarp the list of formats, netCDF is listed there as
>> (rw). Furthermore
>>
>> gdalwarp --format netCDF
>> Format Details:
>>     Short Name: netCDF
>>     Long Name: Network Common Data Format
>>     Extension: nc
>>     Help Topic: frmt_netcdf.html
>>     Supports: CreateCopy() - Create dataset by copying another.
>>
>> ??
>>
>> Joaquim Luis
>>
>> _______________________________________________
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>      
>
>    

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