World Location
A Blockhead's location can be determined using several methods.
A player can determine their location by the direction of the sun's, moon's, or stars' movement over the course of the day. For the purposes of these charts, the player is always at the "top" of the world. The more vertical the sun, the closer the player is to an equator. The more horizontal the sun, the closer the player is to a pole.
Picture your world as a circle, with the sky, ground, and core:
Now add the poles:
North
Near the north pole, celestial objects will move from left to right.
South
Near the south pole, celestial objects will move from right to left.
East
Near the east equator, celestial objects will move upward, from the bottom of the screen to the top.
West
Near the east equator, celestial objects will move downward, from the top of the screen to the bottom.
Provided the area above where a Blockhead is underground has been explored, it is possible to pan the camera to the surface and figure out the Blockhead's location there. The altitude can be figured out by zooming out to map mode and comparing the Blockhead's location to the surface level or the water level.