[gdal-dev] Reading gml with schema

[Jukka Rahkonen]

Ari Jolma <ari.jolma <at> gmail.com> writes:

>     Even, by tweaking I hope you mean tweaking the GML itself? As I
>     believe (being quite ignorant of / unexperienced with XSLT) that
>     with a simple XSLT the XML could be made readable by GDAL. Again,
>     being unexperienced with XSLT, I'm not sure but hope that XSLT
>     processors run in sequential mode, thus the reading could be
>     conveniently handled with a pipe. Hmm, how would that actually work,
>     I'm not sure(?).
>     Anyway, if and when this is *the* GML format NLS Finland uses to
>     serve its data, it would be worthwhile to develop a publishable
>     solution.
>     Cheers,
>     Ari

It is only *one* of the odd GML formats of NLS. There are a few much more 
complicated ones for cadastrial data. The starting point of the schmemas is
on an open server

http://xml.nls.fi/XML/Schema/sovellus/ktjkii/modules/kiinteistotietojen_kyselypalvelu_WFS/Asiakasdokumentaatio/Kuvaus/DescribeFeatureType.xml

This docements poinst to other schemas which can be accessed only thought a
secured WFS server. I guess I do not make a big crime by revealing that the
beginning of the "TYPENAME=ktjkiiwfs:PalstanTietoja" contains references to
nine more schmemas which are at least mostly on an open server again and
they look like this

http://xml.nls.fi/XML/Schema/sovellus/ktjkii/modules/kiinteistorekisteri/tietopalvelu/aineistopalvelu/source/xml/fi/nls/ktjkii/aineistopalvelu/schema/tyypit_aineistopalvelu.xsd

I somehow feel that better than to fiddle with the standard GML driver would
be to make a special NLS driver which would support reading the topological
data first but could be extended later to support also cadastrial data from NLS.

-Jukka Rahkonen-