Leg

Contains the calculated route's details for each path between a pair of positions. The number of legs returned corresponds to one fewer than the total number of positions in the request.

For example, a route with a departure position and destination position returns one leg with the positions snapped to a nearby road:

The StartPosition is the

{
    "Distance": 0,
    "DurationSeconds": 0,
    "EndPosition": [],
    "Geometry": {
        "LineString": []
    },
    "StartPosition": [],
    "Steps": []
}