AddMap registers a map by name with defaultAtlas.

AllMaps returns all registered maps in defaultAtlas.

GetCache returns the registered cache for defaultAtlas, if one is registered, otherwise nil.

GetMap returns a copy of the a map by name from defaultAtlas.

NewMap creates a new map with the necessary default values.

PurgeMapTile will purge a map tile from the configured cache backend for the defaultAtlas.

SeedMapTile will generate a tile and persist it to the configured cache backend for the defaultAtlas.

SetCache sets the cache backend for defaultAtlas.

MaxZoom will not render tile beyond this zoom level.

Atlas holds a collection of maps.