| http://www.w3.org/ns/prov#value | - When the 'polar square' areas are transferred from the sur face of the Earth sphere onto a flat plane such as a map, then a perfect s q u ar e i s fo rm e d w i t h s i d e s 3 6 0 0 m i n u te s l o n g and d i a g on a l s 509 1 . 1 68825 minutes of arc.
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