Module source 

TileSource — the adapter trait every map data source implements.

The framework only ever asks a source for a single tile by (x, y, z); it doesn’t care whether the source reads PNG files from disk, decodes vector MVT, or hits a remote HTTP endpoint with a cache. Implementations are responsible for their own internal threading / caching; the call here is synchronous and is expected to return quickly (None is a perfectly fine answer for “not ready yet” — the controller will ask again on the next refresh).

Structs

TileKey

One tile request. Coordinates are tile-space integers at zoom level z; see crate::projection for the math.

Traits

TileSource

An on-disk or in-memory tile source. Adapters implement this.