WFS 1.1.0 broken by inverted axis in QGIS Server

[qgib]

Author Name: Alessandro Pasotti (@elpaso)
Original Redmine Issue: 18345
Affected QGIS version: 3.0.0
Redmine category:qgis_server
Assignee: René-Luc ReLuc

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Apparently QGIS Server supports WFS 1.1.0 as advertised by its getcapabilities, but when requested to getcapabilities for VERSION=1.1.0 it does no return anything different from the default (which is 1.0).

The result is that QGIS WFS client gets confused and you get inverted axis.

Specifying WFS version 1.1 in the client, does not help while setting it to 1.0 does.

Note that the default setting for WFS is AUTO which also fails.

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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To be more precise: the returned XML is different, what does not change is the SRS specification: according to the specs, it should be urn:x-ogc:def:crs:EPSG:xxxx instead of EPSG: , a WFS 1.1 server returning EPSG:xxxx is not really expected, and a source of confusion

This confuses the client and it is probably a violation of the specifications (not 100% sure about that).

See also: http://docs.geoserver.org/latest/en/user/services/wfs/basics.html#axis-ordering

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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Another evidence: getFeature call always return 1.1 format but coordinates are not inverted and epsg code is not URN prefixed.

I believe this is the real problem: when using WFS 1.1 the coordinates should be lat/lon and the srsName should be prefixed with urn:ogc:def:crs:

GeoServer fully respect this and Mapserver does it partially: see http://mapserver.org/ogc/wfs_server.html#axis-orientation-in-wfs-1-1-and-2-0

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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Things looks more complicated than it seems,

This email exchange is enlightning:
http://lists.osgeo.org/pipermail/standards/2016-October/000994.html

See also:
https://tools.ietf.org/html/rfc5165

And:
http://www.ogcnetwork.net/axisorder

the bottomline is that we should probably change WFS 1.1.0 getfeature response to:

• use urn: prefixed srsName
• return lat/lon instead of lon/lat in GML

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• subject was changed from WFS 1.1.0 broken in QGIS Server to WFS 1.1.0 broken by inverted axis in QGIS Server

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Is this a regression or is also true for 2.*?

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• priority_id was changed from Normal to High
• version was changed from master to 3.1(master)
• regression was changed from 0 to 1

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• status_id was changed from Open to Feedback

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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I don't think this applies to 2.x: the server code has changed completely and AFAIK WFS 1.1 was not supported in 2.x

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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Some more info about other softwares: https://github.com/deegree/deegree3/wiki/Axis-order-handling

[qgib]

Author Name: René-Luc ReLuc (@rldhont)

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Is the master 3.1 or the release 3.0 affected by this issue ?

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• assigned_to_id was configured as René-Luc ReLuc

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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Both.

But you'd better wait for #6644 if you want to fix it.

[qgib]

Author Name: René-Luc ReLuc (@rldhont)

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I'm waiting for #6644

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• version was changed from 3.1(master) to 3.0.0

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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Merged: let me know if you need help.

[qgib]

Author Name: Alessandro Pasotti (@elpaso)

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Can we close this one?

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

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• status_id was changed from Feedback to Closed
• resolution was changed from to no timely feedback