Shape
data class Shape(val shapeId: String, val shapePtLat: Double, val shapePtLon: Double, val shapePtSequence: Int, val shapeDistTraveled: Double? = null) : Comparable<Shape>
See https://developers.google.com/transit/gtfs/reference#shapestxt
See https://developers.google.com/transit/gtfs/reference#shapestxt