Mapbox Vector Tiles layers not displayed

[cns-solutions-admin]

This is a follow-up to #992 that was prematurely closed.

It seems that ol-cesium or cesium has problems with more complex MVT tiles. We have an internal tileserver-gl with vector tiles of OpenStreetMap from Klokantech.

A layer like this is properly displayed in openlayers, but not, when switching to Cesium:

  const layer = new VectorTileLayer({
    source: new VectorTileSource({
      format: new MVT(),
      url: 'https://ourserver/tileserver/data/v3/{z}/{x}/{y}.pbf',
    }),
    declutter: true,
  });
  applyStyle(layer, 'https://ourserver/tileserver/styles/klokantech-basic/style.json'); // (ol-mapbox-style 8.0.8)

Even replacing applyStyle with a simple style does not display the tiles in 3D:

  const layer = new VectorTileLayer({
    source: new VectorTileSource({
      format: new MVT(),
      url: 'https://ourserver/tileserver/data/v3/{z}/{x}/{y}.pbf',
    }),
    style: new Style({
      stroke: new Stroke({color: 'red', width: 2}),
    }),
    declutter: true,
  });

There are no errors or warnings in the console of either Firefox and Chrome. However, there are also no requests for tiles after switching to 3D.

Are there any limitations? Known problems?

[cns-solutions-admin]

You can test this by:

• calling https://www.maptiler.com/maps/#basic//vector/6.62/7.745/45.995 in a browser
• copy a tile request using dev tools/network and insert the x/y/z placeholders
• use this URL in the vector tile source
• open the example in the same browser

[gberaudo]

@cns-solutions-admin, vector tiles support in OL-Cesium is very basic. I have some ideas to implement full support for it (same support as OpenLayers, using @geoblocks/print) but I have no timeline for it.

[RunBoo]

@cns-solutions-admin I am also encountering the same problem now, and I would like to ask how you resolved it.

[cns-solutions-admin]

@RunBoo: we did not resolve it, we are currently using maplibre, which now supports terrain (but still not symbols and lines above the terrain, e.g. aircraft positions and courses).

[RunBoo]

@cns-solutions-admin Thanks for your response, I've found that Mapbox Vector Tiles (MVT) with the EPSG:3857 projection work well, but those with the EPSG:4326 projection do not. I'm confused by this and will try other methods.