Support for 'application/json; subtype=geojson; ' as WFS outputformat in the new mapviewer

[JoëlHempenius3]

I tried to add a WFS layer in the new Mapviewer, but I got an error message that the WFS does not support GeoJSON. However, the WFS does support GeoJSON, but this is specified as 
<ows:Value>application/json; subtype=geojson; charset=utf-8</ows:Value> in the GetCapabilities

I tried another WFS, which also contains <ows:Value>application/json</ows:Value>  in the outputformats and this one works. Therefore, I think the new Mapviewer does not support or understand the <ows:Value>application/json; subtype=geojson; charset=utf-8</ows:Value> outputformat and this might be the reason for the error message. 

My idea: please add support for application/json; subtype=geojson; in the new Map Viewer.

The WFS which doesn't work can be found here:

https://api.data.amsterdam.nl/v1/wfs/woningbouwplannen/?service=WFS&version=2.0.0&request=getcapabil...

And it is capable of GeoJSON output:
https://api.data.amsterdam.nl/v1/wfs/woningbouwplannen/?SERVICE=WFS&VERSION=2.0.0&REQUEST=GetFeature... 

Thank you.

[LaurensBuddingh12]

I would like to add to this and would like for support for GML2, GML3 to be included as it is in ArcGIS Pro.

[Diederik-van-der-Boor]

Developer from Amsterdam here (who wrote that WFS server hosted at the /v1/wfs/ endpoint). I'd be happy to assist here if anything is needed on our side.

I also wonder why this subtype isn't handled. This is the equivalent GetCapabilities response from our older MapServer endpoint which does the same thing: https://map.data.amsterdam.nl/maps/woningbouw?SERVICE=WFS&REQUEST=GetCapabilities Both WFS servers show the same content types, and treat the "subtype" keyword as an alias for the mimetype.

[LaurensBuddingh12]

This other WFS you linked here gets the same response in the viewer: A valid 200 HTTPS response is received, that contains the expected xml from the request.The viewer however does not seem to be able to handle/recognize the resultant GeoJSON format, resulting in a service error.

This is the request: 

https://api.data.amsterdam.nl/v1/wfs/woningbouwplannen/?SERVICE=WFS&REQUEST=GetCapabilities&VERSION=...

this is the response:

(613 lines, so added in pastebin)

https://pastebin.com/MdJZ4j0N

[MiguelParedes]

Greetings  @JoëlHempenius3  and @Diederik-van-der-Boor 

I just wanted to let you know that whilst trying to find a WFS service that only supports the HTTP Get method for requests, I came up with this article, and the WFS created by Diederik, that is https://api.data.amsterdam.nl/v1/wfs/woningbouwplannen
During my testing, I was not able to add the WFS to the MapViewer Classic, however, I was able to successfully add it to the MapViewer (new):

I do not know whether  Joël has tried this since he entered this idea, but the WFS is now working in the MapViewer app, and I thought he might want to know.

Muchos saludos,

Miguel