This class defines the zoom level scheme, overall map extent and
spatial reference information for a tile layer.
By default, the map Universe is automatically derived from the tile layer
definition if there is one. If there is no tile layer or the application
needs to overwrite that defined by the tile layer, the application must
first create such a universe so that the component itself knows the boundary
of the map as well as the zoom level details. Several well known tile layer definitions,
such as the Oracle Maps, lat-lon world map, and Bing
universe, are provided as predefined universes that the application can use.
An object that specifies tile layer configuration.
an instance of OM.layer.TileLayerConfig