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I have noticed rotations in India at some places. At some places rotation are clockwise for 90 degree means West become North, East become South. And at some places rotation are anticlockwise for 90 degree means North become West, East become North. At some places rotation 180 degree means East become West, North become South. Now I think that this rotations are Worldwide as recently visited Canada ( Burnaby and Vancouver) there I also noticed rotations 90 degree and 180 degree clockwise.