Tile Sources

ChamplainTileSource — A base class of tile sources
ChamplainNetworkTileSource — A map source that downloads tile data from a web server
ChamplainNullTileSource — A tile source that doesn't load map data from anywhere
ChamplainFileTileSource — A map source that loads tile data from a file
ChamplainNetworkBboxTileSource — A map source that loads tile data from an OpenStreetMap API server