com.graphhopper.routing.util

Class RoadDensityCalculator

java.lang.Object

com.graphhopper.routing.util.RoadDensityCalculator

public class RoadDensityCalculator
extends Object

Constructor Summary

Constructors

Constructor and Description
RoadDensityCalculator(Graph graph)

Method Summary

Modifier and Type	Method and Description
static void	calcRoadDensities(Graph graph, BiConsumer<RoadDensityCalculator,EdgeIteratorState> edgeHandler, int threads) Loops over all edges of the graph and calls the given edgeHandler for each edge.
double	calcRoadDensity(EdgeIteratorState edge, double radius, ToDoubleFunction<EdgeIteratorState> calcRoadFactor)

Methods inherited from class java.lang.Object

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

Constructor Detail

RoadDensityCalculator

public RoadDensityCalculator(Graph graph)

Method Detail

calcRoadDensities

public static void calcRoadDensities(Graph graph,
                                     BiConsumer<RoadDensityCalculator,EdgeIteratorState> edgeHandler,
                                     int threads)

Loops over all edges of the graph and calls the given edgeHandler for each edge. This is done in parallel using the given number of threads. For every call we can calculate the road density using the provided thread local road density calculator.

calcRoadDensity

public double calcRoadDensity(EdgeIteratorState edge,
                              double radius,
                              ToDoubleFunction<EdgeIteratorState> calcRoadFactor)

Parameters:

radius - in meters

calcRoadFactor - weighting function. use this to define how different kinds of roads shall contribute to the calculated road density

Returns:

the road density in the vicinity of the given edge, i.e. the weighted road length divided by the squared radius