Get an idea how the game handles the map coordinates. Some games start with the (X,Y)/(0,0) being in the top left of the map. Others may use (0,0) in the exact center. Either way as you move right(east) your X-Coord increases, as you move left it decreases. Y-Coord sometimes depends on the game. Ive seen it both increase and decrease as you move in one direction.
Place a waypoint along the X axis and search for increased/decreased values. Once narrowed down place a waypoint near your player and compare your found values with your player coordinates.