Zoom attributes in terrain layer.json

CesiumJS
1

Hello,

The minzoom and maxzoomattributes are present in the layer.json but not used by the Cesium client.

What is it supposed to do?

Guillaume

2

They’re not used by CesiumTerrainProvider at all. Instead, Cesium uses the availability property. The only semi-good reason they exist at all is because they exist in the TileJSON spec, which we (loosely) follow:
https://github.com/mapbox/tilejson-spec/

3

Thank you Kevin for the explanation.

Kevin, Patrick, would there be interest for a PR adding support for minzoom?

A layer.json with tiles starting at level 5 would become:

{ minzoom: 5, available:[{startX: …endX}, …]}

instead of

{ available: [, , , , , [{startX: …endX}, …]}