I'm not sure I understand how to apply the graphical method if I am west of the prime meridian. So far, I've been applying the method in places east of the prime meridian, and the starting point for the drawing is the bottom left corner of the 1 deg X 1 deg box. Do I still start in the bottom left corner if I am west of the prime merdian? Or do I start in the bottom right? Thanks.
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