Re: http://docs.mongodb.org/manual/tutorial/build-a-2d-index/#define-location-range-for-a-2d-index

By default, a 2d index assumes longitude and latitude and has boundaries of -180 inclusive and 180 non-inclusive (i.e. [ -180 , 180 ])

"[ -180 , 180 ]" should be changed to "[ -180 , 180 )", since ")" is notation for non-inclusive.