Hi Marco,

Thanks very much for the advice.  The work around of including the srsName 
parameter, or using WFS 1.0.0, works well and gets us out of a hole.

Given that the inconsistent axis order in nested geometries appears to be a 
bug, I will open a ticket on JIRA.

Kind regards,

Aaron Sedgmen.

From: Marco Volpini <marco.volp...@geo-solutions.it>
Sent: Wednesday, 28 April 2021 5:44 PM
To: Sedgmen Aaron <aaron.sedg...@ga.gov.au>
Cc: Geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] Inconsistent axis order in app-schema WFS json 
output [SEC=OFFICIAL]

Hi,

unfortunately this looks like an AppSchema bug. A possibile workaround for this 
problem is to force the SRS to be EPSG:4326 with east north axis order: you 
should be able to obtain all the geometries with the same coordinates order 
adding the srsName=EPSG:4326 parameter eg. 
https://boreholes.gs.cloud.ga.gov.au/wfs?service=WFS&version=1.1.0&request=GetFeature&typeName=gsmlbh:Borehole&outputFormat=json&featureid=ga.borehole.10093&srsName=EPSG:4326;
 alternatively you can  use wfs 1.0.0 that by default request features using 
the east north axis order.

If you are interested in here some more details on the issue:

the GeoJSON standard mandates a longitude latitude axis order, while the 
different wfs protocol version have different way to handle this (more details 
are available 
here<https://docs.geoserver.org/latest/en/user/services/wfs/axis_order.html#:~:text=The%20formal%20EPSG%20definition%20provides,representation%20has%20east%2Fnorth%20order.>).
The GeoServer encoding mechanism will force, for all the wfs version and CRS 
definition, the order to longitude latitude on the basis of the CRS axis order 
definition of the Geometry. In this case seems that due a bug in AppSchema the 
nested Geometry end up having a  wrong axis order definition and that the 
GeoJSON encoder which wrongly switch the coordinates order.

Best regards,
Marco Volpini

Il giorno ven 23 apr 2021 alle ore 05:39 Sedgmen Aaron 
<aaron.sedg...@ga.gov.au<mailto:aaron.sedg...@ga.gov.au>> ha scritto:
Hi GeoServer Users,

I have an app-schema WFS with a feature type containing a 3D LineString 
geometry.  I’m finding that the axis order of the x,y coordinates is 
inconsistent in the json output, i.e. some features are returned with latitude 
first and longitude second and others the reverse.

Following are two example features from our test server to illustrate the 
issue.  The “shape” property contains the LineString geometry:

Correct axis order - 
https://boreholes.gs.cloud.ga.gov.au/wfs?service=WFS&version=1.1.0&request=GetFeature&typeName=gsmlbh:Borehole&outputFormat=json&featureid=ga.borehole.466607

Incorrect axis order - 
https://boreholes.gs.cloud.ga.gov.au/wfs?service=WFS&version=1.1.0&request=GetFeature&typeName=gsmlbh:Borehole&outputFormat=json&featureid=ga.borehole.10093

gml32 output is ok, i.e. x,y axis order is the same for all features.

The examples are from a GeoServer 2.18.1 and postgres/postgis installation.  
I’ve also tested with GeoServer 2.19.0 and an Oracle database, with the same 
results.  There are no differences in geometry type, srid and ordering of the 
coordinates in the database geometries (both postgis and Oracle) where axis 
order differs in the WFS json output.

Any suggestions or advice on what may be causing the inconsistent axis order 
would be much appreciated.

Regards,

Aaron Sedgmen.


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