Action show pet peeve:
Spy Agency HQ: "We found the bad guy, sending you coordinates now."
Cut to The Hero, who sees "40.755 N, 73.994 W" pop up on her phone.
But if you do the math, that's an area the size of several football fields in downtown Manhattan. Sig figs matter! 
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They could adopt
@what3words for 3m x 3m grid locations. For example try this one ... https://w3w.co/lodge.elite.tasty …
what3words was recently used to save Hetty on @NCISLA |https://vimeo.com/274847013
