[GRASS-dev] Re: [gdal-dev] interpretation of nodata in OGR libraries

[Frank Warmerdam]

Markus Neteler wrote:
>> Reviewing the mk_att() function in v.out.ogr's main.c I don't see
>> any effort to distinguish between null and non-null attributes so
>> I think the problem is just a limitation of v.out.ogr.  If possible,
>> I'd suggest fixing it there.
> 
> Sounds good :)
> Does anyone know how to fix
>  vector/v.out.ogr/main.c
> to support NULLs? I see db_set_value_null() in
>  lib/db/dbmi_base/value.c
> which might be relevant.

Markus,

Once you establish which GRASS attributes are NULL, you can ensure they
are pushed out to OGR as null by just skipping the step that sets them.
Perhaps that will help a bit.

Best regards,
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