[Qgis-user] OAPIF does not honour the view extent

[Even Rouault]

Jukka,

Fixed per https://github.com/qgis/QGIS/pull/54617 . The infinite items 
request came from when requesting the feature count.

The server returns sub-optimal content for QGIS usage:

- the collection metadata does not advertize a extent.spatial.bbox

- the /items answers don't include a "|numberMatched|" property that 
would help to get the feature count (QGIS emits a /items?limit=1 hoping 
that it returns numberMatched)

Even

Le 12/09/2023 à 17:01, Rahkonen Jukka via QGIS-User a écrit :
>
> Hi,
>
> I hoped that the OAPIF driver would honor the check box “Only request 
> features overlapping the view extent” but at least in QGIS 3.32 that 
> does not happen.
>
> How to test:
> - Set project into EPSG:4326
>
> - Open the Debugging/development tools
>
> - Zoom for example to lat-lon 63.189111,23.538514 and set scale into 
> 1:5000
>
> - Add collection “building” from an open OAPIF service 
> https://beta-paikkatieto.maanmittauslaitos.fi/inspire-buildings/features/v1/. 
> Use feature paging with page size 1000.
>
> - Remove the layer from the project because otherwise QGIS continues 
> downloading a few million building polygons
>
> - Check the http requests
>
> The http history shows that after a bunch of probing OAPIF requests 
> QGIS sends plain &items= request without &bbox= and thus asks the 
> server to send the whole collection. What QGIS does right is that it 
> follows the next-links and continues downloading.
>
> https://beta-paikkatieto.maanmittauslaitos.fi/inspire-buildings/features/v1/collections/building/items?limit=1000&crs=http://www.opengis.net/def/crs/EPSG/0/4326 
> <https://beta-paikkatieto.maanmittauslaitos.fi/inspire-buildings/features/v1/collections/building/items?limit=1000&crs=http://www.opengis.net/def/crs/EPSG/0/4326>
>
> I wonder if the view extent limit should work also for OAPIF or is a 
> not-yet implemented feature?
>
> -Jukka Rahkonen-
>
>
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