Some tile servers have different sets of tiles, such as terrain or public transportation overlaid. Unfortunately I am not aware of any free/open tile server that can provide these, but the feature could nevertheless be developed against a proprietary server and by default the example would only have one mode enabled.
Some tile servers have different sets of tiles, such as terrain or public transportation overlaid. Unfortunately I am not aware of any free/open tile server that can provide these, but the feature could nevertheless be developed against a proprietary server and by default the example would only have one mode enabled.