google.maps.PathElevationRequest interface
An elevation query sent by the ElevationService containing the path along which to return sampled data. This request defines a continuous path along the earth along which elevation samples should be taken at evenly-spaced distances. All paths from vertex to vertex use segments of the great circle between those two points.
Properties
Type: Array<LatLng> optional
The path along which to collect elevation values.
Type: number
Required. The number of equidistant points along the given path for which to retrieve elevation data, including the endpoints. The number of samples must be a value between 2 and 512 inclusive.