Skipping unknown layer type circle in vector tiles

[nicogodet]

Describe the bug

The national french institute of geography (IGN) provides a vector tile layer -> https://vectortiles.ign.fr/

Some entities are not recognize because of there type "circle".

Is it a bug, missing feature ?
Should I report this to the provider directly (dunnow if I can) ?

How to Reproduce

1. Add a new vector tile connection:

• URL : https://vectortiles.ign.fr/rok4server/1.0.0/PLAN.IGN/{z}/{x}/{y}.pbf
• style URL : https://vectortiles.ign.fr/demonstrateur/styles/planign.json

2. Add the layer to project.
3. See warnings

QGIS and OS versions

Qgis 3.16.3 Win10

Additional context

[elpaso]

I've just tested this on QGIS master on Linux and I didn't see any warning.

[elpaso]

Can you test a nightly build on windows and see if the issue is still there?

[nicogodet]

Tested on Master windows and same issue.
QGIS 33119ca

[elpaso]

Ok, so to confirm that it's windows only (wierd though).

[nicogodet]

Tested on linux too with master and I reproduce the issue.
Fresh install, fresh profile
QGIS 7edd999

[elpaso]

Ok, let's remove the windows tag. It's wierd I cannot see the warning though.

[nicogodet]

Let's try something.

Zoom to coordinates

• EPSG:2154 : 404936.8,6265925.6

• WGS84 : -0.643611,43.431146

You should see an electrical line and as you don't any warnings, you should be able to see electric pylons
An image of WMS server that render the vector tiles.

You can see the pylon and a water point (blue circle)

An image of what I see on the vector tile layer.

No pylon, no blue circle.

[elpaso]

I see no dots/circles and no warnings, but there is a network error in the logs. I'm using a 4K display (the @2x in the log makes me think that it might matter).

[nyalldawson]

I'm 99% sure we never added support for circle conversion, simply because we couldn't find ant styles which utilised it at the time 😝

[nicogodet]

That would explain my warnings 😃

I have the network warning too and i'm not using a 4K display but I don't think it's related to current issue.

[agiudiceandrea]

Hi @nicogodet I tried the layer using QGIS 3.16.3 on Windows 7 64 bit but I don't see any of the errors you reported.
I only see the warning "Error transferring https://vectortiles.ign.fr/demonstrateur/sprite/PlanIgn@2x.json - server replied: Not Found" previously reported by @elpaso (I'm not using a 4K display).

[nicogodet]

Can you see circles for pylons and water point #41529 (comment) ?

You can identify the features but they are not rendered (missing circle implementation as @nyalldawson said before).

Why I have warnings and not you ?

[agiudiceandrea]

When I add the layer with the style URL, the electric pylons circles and the water point circle are not rendered

When I add the layer without the style URL, the electric pylons circles and the water point circle are rendered

[nicogodet]

I still not understand why it raises warnings here (3 differents computers, 3.16, master, windows, linux, fresh profile, ...).
On your first screen it's clear that those features are not rendered and if you look to json style, it corresponds to circle.

        {
            "id": "bati ponctuel infrastructure - pylone électrique",
            "type": "circle",
            "source": "plan_ign",
            "source-layer": "bati_ponc",
            "layout": {
                "visibility": "visible"
            },
            "filter": ["==","symbo","PYLONE_ELEC"],
            "paint": {
                "circle-radius" : {
                    "stops": [[13, 1], [17, 2]]
                },
                "circle-color" : "#000000"
            }
        },

[agiudiceandrea]

I still not understand why it raises warnings here (3 differents computers, 3.16, master, windows, linux, fresh profile, ...).

I found the reason...
If the vector tile layer is added using the "Data Source Manager" then only the warning "Error transferring https://vectortiles.ign.fr/demonstrateur/sprite/PlanIgn@2x.json - server replied: Not Found" is displayed.

While, adding the layer using the Browse Panel, the warning "Vector tiles : Style could not be completely converted" with the additional details

The following warnings were generated while converting the vector tile style:
bati ponctuel hydrographique - Chateau d'eau: Skipping unknown layer type circle
bati ponctuel hydrographique - Réservoir d'eau: Skipping unknown layer type circle
bati ponctuel infrastructure - pylone électrique: Skipping unknown layer type circle
hydro ponctuel: Skipping unknown layer type circle
routier ponctuel - peage ponctuel: Skipping unknown layer type circle

are also displayed.

Anyway the result is the same: some features are not rendered.

[PeterPetrik]

I can fix this is noone is working at it?

[nyalldawson]

Thanks @PeterPetrik -- no-one is working on it yet.