Oh wait, it's trivial. The shortest distance between two Tesla Supercharger stations is a straight line. To make this more realistic, we could have the distance_on_earth function call the Google Maps Directions API instead of calculating a great circle route. For example, directions from the Auburn, Alabama (32.627837, -85.445105) to the Greenville superstation (31.855989, -86.635765) show a distance of 102 miles. "distance" : {
I can't prove that this shape is longer
We could allow the Tesla salesman to avoid "any combination of tolls, highways and ferries," or even find the shortest path by walking to all the superstations. "text" : "102 mi",
"value" : 163692
},
"duration" : {
"text" : "1 hour 30 mins",
"value" : 5415
}