Imagine you are standing in a yard with a flagpole nearby. Your task is to define where the flag is.
You measure out that the pole is 10 yards North and 15 yards West of your location.
If you define your current position as the center that would be 0,0.
And the bottom of the pole would be at 10,15 (10 yards North and 15 yards West).
But where is the FLAG?
Well, it’s 3 yards above the the ground. That’s your Z axis. So the flag is at 10,15,3. Or
X: 10 yards north
Y: 15 yards west
Z: 3 yards UP
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