Function map_model::make::parking_lots::make_all_parking_lots

pub fn make_all_parking_lots(
    input: &[RawParkingLot],
    aisles: &[(WayID, Vec<Pt2D>)],
    map: &Map,
    timer: &mut Timer<'_>
) -> Vec<ParkingLot>

Take in parking lots from OSM and all parking aisle roads. Match parking lots to the nearest sidewalk + driving lane, then automatically generate individual parking spots perpendicular to the aisles.