Some imagery layers from ion don't drape on 3DTiles

[lukemckinstry]

What happened?

Testing #12913 which adds a Google2DImageryProvider to support new ion assets from Google Maps, a few ion assets - in particular Google Maps Labels Only (ion assetId: 3830185) which is the equivalent to Bing Maps Labels only (ion assetId: 2411391) - do not drape as expected as shown in our draping imagery sandcastle.

I am able to create an overlay with Google Maps labels using the Google2DImageryProvider that drapes as expected (see below), but it would be good to ensure draping works with our curated assets in ion.

This could be a code issue in CesiumJS or an "asset" (but really code) issue in ion, not sure which yet, but leaving the issue in CesiumJS for great visibility and documentation of the workaround.

Works

Google Maps Labels Only Overlay drapes fine (ie this is a workaround) sandcastle

// Create the imagery layer for Google Maps (labels only)
const labelImageryLayer = Cesium.ImageryLayer.fromProviderAsync(
  Cesium.Google2DImageryProvider.fromIonAssetId({
    assetId: 3830182,
    overlayLayerType: "layerRoadmap"
  })
);
tileset.imageryLayers.add(labelImageryLayer);

Doesn't work

Curated ion GoogleMaps Labels Only overlay does not show sandcastle

// Create the imagery layer from ion asset for Google Maps (labels only)
const labelImageryLayer = Cesium.ImageryLayer.fromProviderAsync(
  Cesium.IonImageryProvider.fromAssetId(3830182),
);
tileset.imageryLayers.add(labelImageryLayer);

Note - I can switch these sandcastle urls to prod sandcastle after the Oct 1 release

Reproduction steps

...

Sandcastle example

No response

Environment

Browser:
CesiumJS Version:
Operating System:

[lukemckinstry]

The Google Maps Labels Only layer drapes fine on Google Photorealistic 3D Tiles
sandcastle

The density of labels is quite low in the Google Maps Labels Only overlay, and there appear to be almost no labels at the nearest zoom levels. Since the tileset in the draping example is quite small (just downtown Philadelphia) a guess is that no label tiles are entirely "contained" within the tileset and therefor not shown.

The Bing Maps Labels Only and Google Maps Labels Only are actually pretty different overlays. A better Google equivalent for the Bing overlay would be the following as mentioned above.

// Create the imagery layer for Google Maps (labels only)
const labelImageryLayer = Cesium.ImageryLayer.fromProviderAsync(
  Cesium.Google2DImageryProvider.fromIonAssetId({
    assetId: 3830182,
    overlayLayerType: "layerRoadmap"
  })
);
tileset.imageryLayers.add(labelImageryLayer);