[gdal-dev] GML / NAS code redundancy

[Martin Landa]

Hi,

2014-03-18 17:25 GMT+01:00 Even Rouault <even.rouault at mines-paris.org>:

>> right, after digging into the code I discovered that `featureType`
>> from `gml_registry.xml` is checked only in header (first 2048 bytes)
>> [1]. This check fails in my case because features are not included in
>> szHeader buffer. Could be that I overlooked something...
>
> Ah, well all of this is heuristics, so you could likely increase the buffer size
> if it remains at reasonable size.
>
> Another idea, if the patterns to recognize are much further in the file, since
> at that point we know that it is GML, would be to separate the recognition of
> whether it is GML or not (that has succeeded since you reached that point) from
> the recognition of what stuff there is in the GML, in which case you could
> afford to read more. But namespaces declaration are usually rather at the
> beginning of the file, so if 2048 doesn't work, perhaps 4096 would do.

here is a sample data [1]. There are 8 feature types -

feature type -> first occurrence in the file
vf:Obec -> 2383
vf:CastObce -> 27267
vf:KatastralniUzemi -> 27774
vf:Zsj ...
vf:Ulice
vf:Parcela
vf:StavebniObjekt
vf:AdresniMisto

Thanks for clarification in advance... Martin

[1] http://vdp.cuzk.cz/vymenny_format/soucasna/20140131_OB_502405_UKSH.xml.gz