2

When I try to load WFS layer it shows blank area, even there is some information in attribute table. And instead on vector layer it shows new icon.

Here is the source: https://www.avoindata.fi/data/fi/dataset/oulun-kaupungin-aanestysaluejako

Here is WFS link: https://e-kartta.ouka.fi/TeklaOGCWebOpen/WFS.ashx

2 Answers 2

6

Unfortunately they have configured their service to contain all the geometries as GEOMETRYCOLLECTION datatype, that QGIS does not handle. Test with

https://e-kartta.ouka.fi/TeklaOGCWebOpen/WFS.ashx?SERVICE=WFS&REQUEST=GetFeature&VERSION=1.1.0&TYPENAME=gis:Aanestysalueet&MAXFEATURES=1&SRSNAME=EPSG:3133

You'll see that the returned GML contains a geometrycollection with one polygonz and one pointz geometry.

GDAL can read data from the service

ogrinfo WFS:"https://e-kartta.ouka.fi/TeklaOGCWebOpen/WFS.ashx" gis:Aanestysalueet  

If you want to get the data and get rid of the geometry collections I would suggest to use ogr2ogr https://gdal.org/programs/ogr2ogr.html with the -explodecollections option

-explodecollections

Produce one feature for each geometry in any kind of geometry collection in the source file, applied after any -sql option.

4

There appears to be an issue with the returned GML whether it be the default GML2, or the GML3 requested by QGIS; that is both of these requests give invalid responses:

https://e-kartta.ouka.fi/TeklaOGCWebOpen/WFS.ashx?SERVICE=WFS&REQUEST=GetFeature&VERSION=1.0.0&TYPENAME=gis:Kaupunginosat&MAXFEATURES=1&OUTPUTFORMAT=GML3

https://e-kartta.ouka.fi/TeklaOGCWebOpen/WFS.ashx?SERVICE=WFS&REQUEST=GetFeature&VERSION=1.0.0&TYPENAME=gis:Kaupunginosat&MAXFEATURES=1&

The errors for the GML3 response are:

Attribute 'srsName' must appear on element 'gml:MultiGeometry'.

Invalid content was found starting with element '{"http://www.opengis.net/gml":PolyhedralSurface}'. One of '{"http://www.opengis.net/gml":_Geometry}' is expected.

Invalid content was found starting with element '{"http://www.opengis.net/gml":name}'. One of '{"http://www.opengis.net/gml":coord, "http://www.opengis.net/gml":coordinates}' is expected.

The error on the GML2 response is:

Invalid content was found starting with element '{"http://www.opengis.net/gml":name}'. One of '{"http://www.opengis.net/gml":coord, "http://www.opengis.net/gml":coordinates}' is expected.

I see that QGIS doesn't allow you to request GML2 from a WFS 1.0 service, which may be a potential issue (selection box is greyed out).

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