[gdal-dev] Fwd: Converting multi-geometry GML with ogr2ogr not working

[Even Rouault]

Le mercredi 16 décembre 2015 12:05:23, Stefan van der Hoorn a écrit :
> All
> 
> I am having difficulties with GML loading in PostGIS with ogr2ogr.
> 
> It is a GML of buildingparts containing both polygons and (label)-points.
> In this example (below) I have a selection of 9 objects. The number of
> polygons is 9 and there are 6 point-objects. So there are 6 object with
> both polygon and point geometry.

Stefan,

By default when parsing a GML file without a side .xsd file (or if it cannot 
understand the .xsd file), the GML driver will only report the "last" geometry
element in a feature (should perhaps be improved, but that's another story).

You can manually workaround that by explictly define in the .gfs file that
OGR produces the first time it reads a GML file the following, which will define
explictly where to find geometries.

<GMLFeatureClassList>
  <GMLFeatureClass>
    <Name>BuildingPart</Name>
    <ElementPath>BuildingPart</ElementPath>
    <SRSName>urn:ogc:def:crs:EPSG::28992</SRSName>

<!-- beginning of additions -->
    <GeomPropertyDefn>
        <Name>geometrie2dGrondvlak</Name>
        <ElementPath>geometrie2dGrondvlak</ElementPath>
        <Type>MultiPolygon</Type>
    </GeomPropertyDefn>
    <GeomPropertyDefn>
        <Name>plaatsingspunt</Name>
        <ElementPath>nummeraanduidingreeks|Nummeraanduidingreeks|nummeraanduidingreeks|Label|positie|Labelpositie|plaatsingspunt</ElementPath>
        <Type>Point</Type>
    </GeomPropertyDefn>
<!-- end of additions -->
[... unmodified rest of file ... ]


This is documented in the "Syntax of .gfs file by example" section of http://gdal.org/drv_gml.html

Even

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