org.transitime.gtfs

Class StopPathProcessor

java.lang.Object

org.transitime.gtfs.StopPathProcessor

public class StopPathProcessor
extends java.lang.Object

Part of GtfsData class. Processes the shapes.txt data and converts into the segments for the associated stopPaths between the stops.

Author:

SkiBu Smith

Constructor Summary

Constructors

Constructor and Description
StopPathProcessor(java.util.Collection<GtfsShape> gtfsShapes, java.util.Map<java.lang.String,Stop> stopsMap, java.util.Collection<TripPattern> tripPatterns, double offsetDistance, double maxStopToPathDistance, double maxDistanceForEliminatingVertices, boolean trimPathBeforeFirstStopOfTrip) Constructor.

Method Summary

Modifier and Type	Method and Description
void	processPathSegments() Determines the path segments for each trip pattern.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StopPathProcessor

public StopPathProcessor(java.util.Collection<GtfsShape> gtfsShapes,
                         java.util.Map<java.lang.String,Stop> stopsMap,
                         java.util.Collection<TripPattern> tripPatterns,
                         double offsetDistance,
                         double maxStopToPathDistance,
                         double maxDistanceForEliminatingVertices,
                         boolean trimPathBeforeFirstStopOfTrip)

Constructor. Stores parameters.

Parameters:

gtfsShapes -

stopsMap -

tripPatterns -

offsetDistance - How much to the right the stopPaths should be offset. If negative then the stopPaths are offset to the left. If 0.0 then of course the stopPaths are not offset at all.

maxStopToPathDistance -

maxDistanceForEliminatingVertices - For getting rid of really small segments

Indicates - that shouldn't use the shape before the first stop of the trip. This can be useful because sometimes a single shape is used for multiple trip patterns or the shapes simply have some problem points at the beginning (like sfmta 21-Hayes.

Method Detail

processPathSegments

public void processPathSegments()

Determines the path segments for each trip pattern. If shapes.txt GTFS file has a shape for the trip pattern then that data is used. Otherwise will simply connect the stops with straight line stopPaths. When shapes.txt data is used a lot of processing is done. The path segments are offset orthogonally by the offsetDistance which is useful if the shapes.txt info is simply street centerline data. By offsetting the path segments for the different directions won't completely overlap on the map. Then the stops are matched to the shapes in order to create the Paths. Each path is for a separate stop and the path ends at the stop. The path segments are also filtered so that segments that are too short or too long are adjusted.