Make a secondary raster source act as a fallback with geojson boundaries

[laem]

Hi,

I have two satellite raster sources.

One from the French public map administration, IGN. It covers France's territories (which is a complex worldwide set of polygons) at zoom > 12, but also the whole world at zoom < 12.

I do have the boundaries as geojson (source is here as .poly, simply use geojson.io to convert it to geojson).

Then I have MapTiler's worldwide satellite imagery, but it costs quite a lot of money with a bit of usage. Hence, I'd like to prefer the local source for local zoom,lat,lon and the global source for the rest of the usage.

At zoom > 12, the French source should be preferred, no maptiler source should be used.

At zoom > 12 inside of the French multi-polygon, the French source should be used.

At zoom > 12 outside of the French multi-polygon, the MapTiler source should be used.

How can I do that in my style.json ?

Regads

[HarelM]

I don't think you can do that in style.json as it's current definition, but you can do that with addProtocol.

[laem]

Thanks ! Do you have an example of a similar addProtocol ? I did it for pmtiles but have no idea how raster are handled.

[HarelM]

It's very similar...