org.opentripplanner.analyst.request

Class SampleGridRenderer

java.lang.Object

org.opentripplanner.analyst.request.SampleGridRenderer

public class SampleGridRenderer
extends Object

Compute a sample grid from a SPT request. First compute a shortest-path-tree from the given routing request. It then build the sample grid (a regular grid of samples covering the whole SPT area) using an accumulative grid sampling process.

Author:

laurent

See Also:

ZSampleGrid, AccumulativeGridSampler

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SampleGridRenderer.WTWD The default TZ data we keep for each sample: Weighted Time and Walk Distance For now we keep all possible values in the vector; we may want to remove the values that will not be used in the process (for example # of boardings).
static class	SampleGridRenderer.WTWDAccumulativeMetric Any given sample is weighted according to the inverse of the squared normalized distance + 1 to the grid sample.

Constructor Summary

Constructors

Constructor and Description
SampleGridRenderer(Graph graph)

Method Summary

Modifier and Type	Method and Description
ZSampleGrid<SampleGridRenderer.WTWD>	getSampleGrid(SampleGridRequest spgRequest, RoutingRequest sptRequest)
static void	sampleSPT(ShortestPathTree spt, ZSampleGrid<SampleGridRenderer.WTWD> sampleGrid, double gridSizeMeters, double offRoadDistanceMeters, double offRoadWalkSpeedMps, double maxWalkDistance, int maxTimeSec, double cosLat) Sample a SPT using a SPTWalker and an AccumulativeGridSampler.

Methods inherited from class java.lang.Object

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

Constructor Detail

SampleGridRenderer

public SampleGridRenderer(Graph graph)

Method Detail

getSampleGrid

public ZSampleGrid<SampleGridRenderer.WTWD> getSampleGrid(SampleGridRequest spgRequest,
                                                          RoutingRequest sptRequest)

Parameters:

spgRequest -

sptRequest -

Returns:

sampleSPT

public static void sampleSPT(ShortestPathTree spt,
                             ZSampleGrid<SampleGridRenderer.WTWD> sampleGrid,
                             double gridSizeMeters,
                             double offRoadDistanceMeters,
                             double offRoadWalkSpeedMps,
                             double maxWalkDistance,
                             int maxTimeSec,
                             double cosLat)

Sample a SPT using a SPTWalker and an AccumulativeGridSampler.