It's a way to check direction, when you press:
With in game minimap game are too easy, but when i with friends on multiplayer explore 33.000x16.000 blocks area and something over 150 translocator it will be hard to remember evertything. its a good to dawning a map in medieval style - with relative positions of objects on map. Or i have a copy of our world ( generated by same seed and setups ) in creative mode, when we find something in wilderness i'm use this copy in creative to fast find same pleaces and generate map - making print screen and binding together into big map in photoshop. Then export map files to Google Drive Drawing and adding symbols, texts, roads. Google Drawing can be easy share to other players. In this way we have map, but when we will use the new translocator we first must find them localisation before i can mapped them and add to our map. It's a compromise between playing without an auto-map and having a map.