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the original discussion (quite verbose) could be viewed here, https://www.reddit.com/r/MapPorn/comments/7ndxz9/i_tried_to_find_the_date_of_origin_for_every/d
by 68c12c16 9y ago
the original discussion (quite verbose) could be viewed here,
https://www.reddit.com/r/MapPorn/comments/7ndxz9/i_tried_to_find_the_date_of_origin_for_every/ds134a9/