GPS=Global Position system. A Part of world have area differ. Somebody start fix line on our world. By start from England follow vertical calling Longtitude line. When world moving. Position of world see sun follow moving of world. Longtitude line help you about different time.After you know time in your area. Do you want know your position? If you fix Horizontal line start from center of world. Count go to North with Count go to south. When Vertical line intersect with Horizental line. Small point is position of that area. We can know position in world from this thing.
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