[gdal-dev] Documentation of .gfs file format

[Johannes Echterhoff]

Even,
Thanks for the source code reference. That was quite useful to identify even more XML elements that can occur in a gfs file.
I’ll see what I can do about an xsd for gfs. Would you be willing to help me in this regard? That would mainly be clarification of schema specifics (like element types), as well as element semantics, where necessary.
Best regards,
Johannes

Von: Even Rouault <even.rouault at spatialys.com>
Gesendet: Dienstag, 25. Oktober 2022 20:08
An: Johannes Echterhoff <echterhoff at interactive-instruments.de>; gdal-dev at lists.osgeo.org
Betreff: Re: [gdal-dev] Documentation of .gfs file format


Johannes,

You have a number of .gfs templates file in https://github.com/OSGeo/gdal/tree/master/data

Otherwise just read the code of GMLFeatureClass::InitializeFromXML() if you want to have the full view of what the GFS reader understand: https://github.com/OSGeo/gdal/blob/master/ogr/ogrsf_frmts/gml/gmlfeatureclass.cpp#L456 which is the ultimate authoritative source. That said a .xsd file for .gfs could be useful, if that's something you'd be willing to contribute.

Even
Le 25/10/2022 à 15:16, Johannes Echterhoff a écrit :
Hello,

The documentation of the GML driver on https://gdal.org/drivers/vector/gml.html has two sections that describe the .gfs file format to some extent (section “Syntax of .gfs file by example” and section “Advanced .gfs syntax”). When looking for more information about the .gfs format, I came across https://github.com/OSGeo/gdal/issues/1138, where <precision> was mentioned as an additional element that can be used in .gfs files.

Is the .gfs. file format documented somewhere in full detail? I would like to write .gfs template files, and in order to do so, knowing all available elements, options, as well as syntax requirements would be great to know. So far, I only came across a number of examples – which certainly help – but I would like to consult an authoritative source, if there is one.

Best regards,
Johannes




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