[gdal-dev] GML / NAS code redundancy

[Jukka Rahkonen]

Even Rouault <even.rouault <at> mines-paris.org> writes:

> 
> Selon Martin Landa <landa.martin <at> gmail.com>:
> 
> > Hi,
> >
> > 2014-03-18 17:50 GMT+01:00 Even Rouault <even.rouault <at> mines-paris.org>:
> > > I haven't looket at the file but from the above, the logic of the
> > application
> > > schema registry would need to be extended since it currently only supports
> > one
> > > feature type per file. You would need to ingest the full file to recognize
> > which
> > > feature types are in it.
> >
> > there is probably some misunderstanding, at [1] there is mentioned
> > Finish registry which contains different feature types
> > (KiinteistorajanSijaintitiedot, PalstanTunnuspisteenSijaintitiedot,
> > ...). It means that in the input file can be only one feature type not
> > all of them?
> 
> Yes, as far as I remember there were only one feature type per file, hence
this
> (non-fundamental) restriction in the code. I looked at bit at your sample
and I
> think you could just use the current code without changing it (well perhaps
> increase the szHeader size). Add in the GML registry your feature types
and make
> them point to the same .gfs file that define all the feature types ! The only
> drawback is that you could have empty layers if not all feature types are
found,
> but that should work OK otherwise.

Hi,

If you want to compare the data from National Land Survey of Finland you can
find the schema for each feature type from page
http://www.maanmittauslaitos.fi/aineistot-palvelut/rajapintapalvelut/kiinteistotietojen-kyselypalvelu-wfs/kayttoonotto/aineistot-tuo

Follow links "Tuotteen skeema". Data samples are available from page
http://www.maanmittauslaitos.fi/aineistot-palvelut/rajapintapalvelut/kiinteistotietojen-kyselypalvelu-wfs/kayttoonotto/kyselyt-esime
follow links "GML-vastaussanoma".

Each featuretype is separate but may contain many layers

C:\data\MML-GML>ogrinfo palstan_tietoja.gml
Had to open data source read-only.
INFO: Open of `palstan_tietoja.gml'
      using driver `GML' successful.
1: RekisteriyksikonTietoja (None)
2: RekisteriyksikonPalstanTietoja (Unknown (any), Unknown (any))
3: KiinteistorajanTietoja
4: RajamerkinTietoja

-Jukka Rahkonen-