The Protobuf object to read from
The end position of the message in the buffer
OptionalencodedEncoded polyline representation of the shape. This polyline must contain at least two points. For more information about encoded polylines, see https://developers.google.com/maps/documentation/utilities/polylinealgorithm This field is required as per reference.md, but needs to be specified here optional because "Required is Forever" See https://developers.google.com/protocol-buffers/docs/proto#specifying_field_rules NOTE: This field is still experimental, and subject to change. It may be formally adopted in the future.
OptionalshapeIdentifier of the shape. Must be different than any shape_id defined in the (CSV) GTFS. This field is required as per reference.md, but needs to be specified here optional because "Required is Forever" See https://developers.google.com/protocol-buffers/docs/proto#specifying_field_rules NOTE: This field is still experimental, and subject to change. It may be formally adopted in the future.
Describes the physical path that a vehicle takes when it's not part of the (CSV) GTFS, such as for a detour. Shapes belong to Trips, and consist of a sequence of shape points. Tracing the points in order provides the path of the vehicle. Shapes do not need to intercept the location of Stops exactly, but all Stops on a trip should lie within a small distance of the shape for that trip, i.e. close to straight line segments connecting the shape points NOTE: This message is still experimental, and subject to change. It may be formally adopted in the future.