Issue loading OpenStreetMap WMTS in Cesium for Unreal

Cesium for Unreal
1

Hello Cesium team,

I’m trying to load an OpenStreetMap WMTS layer in Cesium for Unreal using the UCesiumWebMapTileServiceRasterOverlay component.

I am using the following WMTS capabilities URL:
:backhand_index_pointing_right: https://osmlab.github.io/wmts-osm/WMTSCapabilities.xml

This URL works correctly in QGIS, and the WMTS service appears valid and functional. However, when I attempt to use this URL with CesiumWebMapTileServiceRasterOverlay in Unreal, nothing is displayed.

Any help or guidance would be greatly appreciated!

Thanks

2

Hi @bingrifuyue,
Try using the base URL (https://osmlab.github.io/wmts-osm/) rather then the GetCapabilities URL. I’m not certain that will work, but it’s the first thing to try.

3

Hi Kevin,
I followed your suggestions, but unfortunately it’s still not working.
Please let me know if there’s anything else I can try.

Best regards

4

@Kevin_Ring

5

Please share the error message in the output log, as that may give us a good hint about what to try next.

6

@bingrifuyue

That site just serves the capabilities file - which to my knowledge, Cesium doesn’t support this layer of indirection. It requires direct URLs, either in KVP or RESTful form.

Using https://osmlab.github.io/wmts-osm won’t work, as you found. Cesium would try to get tiles from it and it’d be saying, “Hang on, I don’t have 'em - I’m just telling you where to get them from.”

I just manually grabbed the RESTful URL out of the Capabilities file at that site: https://a.tile.openstreetmap.org/{TileMatrix}/{TileCol}/{TileRow}.png
and used it in the UCesiumWebMapTileServiceRasterOverlay component, and the OSM overlay rendered fine.