cocos 2d tile map 관련 link
prog_guide:tiled_maps
http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:tiled_maps
Tiled, a generic tile map editor
http://mapeditor.org/
TileMapAtlas vs TMXTiledMap anchor points
http://www.cocos2d-iphone.org/forum/topic/1390