Some Vector Tile style sheets don't work with custom viewer.

[ZedeN1]

I compiled a custom viewer as per #586. For the Vector Tile Grayscale backgroundLayer below, the custom viewer does not GET the tiles if the Greyscale style is used. The same vector tile with the colour styles works OK.

I can see that Firefox manages to GET the greyscale style json. I don't see any logs that would explain or point at the issue.

The default qwc-docker viewer manages to display the same Vector Tile without problem.

{
        "name": "Vector Tile Grayscale",
        "type": "mvt",
        "url": "https://api.os.uk/maps/vector/v1/vts/tile/{z}/{y}/{x}.pbf?srs=3857&key=xxxxxx",
        "style": "https://raw.githubusercontent.com/OrdnanceSurvey/OS-Vector-Tile-API-Stylesheets/master/OS_VTS_3857_Greyscale.json",
        "declutter": false,
        "projection": "EPSG:3857",
        "thumbnail": "vt_grayscale.png"
      },
      {
        "name": "Vector Tile Colour",
        "type": "mvt",
        "url": "https://api.os.uk/maps/vector/v1/vts/tile/{z}/{y}/{x}.pbf?srs=3857&key=xxxxxx",
        "style": "https://api.os.uk/maps/vector/v1/vts/resources/styles?srs=3857&key=xxxxxx",
        "declutter": false,
        "projection": "EPSG:3857",
        "thumbnail": "vt_colour.png"
      },

[ZedeN1]

Reverting components/map/layers/MVTLayer.js to https://github.com/qgis/qwc2/blob/c3159281e9021cd504783f7d3873e192c8fe8aee/components/map/layers/MVTLayer.js fixes the issue.

Commit qgis/qwc2@f310a2e seems to be the cause

[manisandro]

I'll need to look into this. How can one obtain a key for this service?

[ZedeN1]

https://osdatahub.os.uk/

It's free under fair use.

[manisandro]

Does [1] help along with

                    {
				"name": "os_uk_vt_colour",
				"type": "mvt",
				"url": "https://api.os.uk/maps/vector/v1/vts/tile/{z}/{y}/{x}.pbf?srs=3857&key=xxx",
				"style": "https://api.os.uk/maps/vector/v1/vts/resources/styles?srs=3857&key=xxx",
				"declutter": false,
				"projection": "EPSG:3857",
				"thumbnail": "vt_colour.png",
				"styleOptions": {
					"accessTokenParam": "key",
					"accessToken": "xxx"
				}
			  }

? For me, it renders the colour style correctly. It also renders the gray style, but completely off-place.

[1] qgis/qwc2@e2e49d0