ios - Google maps api directions JSON output get parameter of compass? -


i'm working on new app in ios dev need using google maps api. read google maps api web services,json , there outputs parameters:"route","legs","step",etc. in app have 1 leg (no waypoints) , x steps & each step calculate compass angle - not in true time (getheading() or something). say, getting angle (clockwise north) in point of view of specific step , use later goal.

so how compass parameter in json output? worng exp:

   {    "staus":"ok",    "routes": [{ ....        "legs":[{           "steps":[{...             "start_location":             "end_location":              /*------------------------*\             ??? "compass_angle": ???               /*------------------------*\             ]}        ]}           ]}     } 

you use formula here calculate initial bearing between 2 coordinates:

http://www.movable-type.co.uk/scripts/latlong.html


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