[gdal-dev] Fwd: NotImplementedError: Wrong number of arguments for overloaded function 'Feature_SetField'.

[Even Rouault]

Selon Ole Nielsen <ole.moller.nielsen at gmail.com>:

> Thanks - I was hoping I could rely on the library to do the intelligent
> truncation, but couldn't work it out.
> Can I just clarify that the name to use with SetField would then be what is
> provided by your last line?
>
>  layer_defn.GetFieldDefn(last_field_idx).GetNameRef()

Yes

>
> Cheers and thanks
> Ole
>
> On Tue, Sep 6, 2011 at 9:26 PM, Even Rouault
> <even.rouault at mines-paris.org>wrote:
>
> > Selon Ole Nielsen <ole.moller.nielsen at gmail.com>:
> >
> > > Hi Even
> > >
> > > Thanks again for all your help - all tests now pass using either gdal 1.6
> > or
> > > 1.8. Just to summarise, there were three issues as I see them:
> > >
> > >
> > >    1. Bounding boxes for raster data are computed differently (but
> > better)
> > >    in newer versions
> >
> > Specific to PixelIsPoint in the GTiff driver.
> >
> > >    2. While v1.6 of ogre would allow an single number of type
> > numpy.ndarray
> > >    this is no longer allow. Casting it to a float solves the problem.
> >
> > I wasn't aware it could work before. There's perhaps now an ambiguity on
> > which
> > method to use, due to the addition of new possibilities for SetField()
> > (just a
> > bling guess).
> >
> > >    3. New versions of ogre will not allow attribute names of length
> > longer
> > >    than 10 (at least when using the ESRI driver). Formerly, I think it
> > > silently
> > >    truncated, now it is up to the user. That's at least what I did.
> >
> > I've a looked quickly a bit at your code and I've the feeling that you
> > truncate
> > yourself, instead of relying on OGR. The Shapefile driver does more than
> > truncating. It also ensures uniqueness of the truncated names. For example,
> > if
> > you try creating "a_very_long_name" and "a_very_long_name_again", they will
> > be
> > respectively truncated to "a_very_lon" and "a_very_l_1". A safer solution
> > to get
> > the field name that got to the file would be to :
> >
> > field_defn = ogr.FieldDefn("a_very_long_name", ogr.OFTString)
> > lyr.CreateField(field_defn)
> > layer_defn = lyr.GetLayerDefn()
> > last_field_idx = layer_defn.GetFieldCount() - 1
> > real_field_name = layer_defn.GetFieldDefn(last_field_idx).GetNameRef()
> >
>