com.graphhopper.util

Class DistanceCalc2D

java.lang.Object

com.graphhopper.util.DistanceCalcEarth

com.graphhopper.util.DistanceCalc2D

All Implemented Interfaces:

DistanceCalc

public class DistanceCalc2D
extends DistanceCalcEarth

Calculates the distance of two points or one point and an edge in euclidean space.

Author:

Peter Karich

Field Summary

Fields inherited from class com.graphhopper.util.DistanceCalcEarth

C, KM_MILE, R, R_EQ

Constructor Summary

Constructors

Constructor and Description
DistanceCalc2D()

Method Summary

Modifier and Type	Method and Description
double	calcDenormalizedDist(double normedDist) Inverse to calcNormalizedDist.
double	calcDist(double fromY, double fromX, double toY, double toX) Calculates distance of (from, to) in meter.
double	calcNormalizedDist(double dist) Returns the specified length in normalized meter.
double	calcNormalizedDist(double fromY, double fromX, double toY, double toX) Calculates in normalized meter
String	toString()

Methods inherited from class com.graphhopper.util.DistanceCalcEarth

calcCircumference, calcCrossingPointToEdge, calcNormalizedEdgeDistance, calcNormalizedEdgeDistanceNew, createBBox, isCrossBoundary, isDateLineCrossOver, projectCoordinate, validEdgeDistance

Methods inherited from class java.lang.Object

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

Constructor Detail

DistanceCalc2D

public DistanceCalc2D()

Method Detail

calcDist

public double calcDist(double fromY,
                       double fromX,
                       double toY,
                       double toX)

Description copied from class: DistanceCalcEarth

Calculates distance of (from, to) in meter.

http://en.wikipedia.org/wiki/Haversine_formula a = sin²(Δlat/2) + cos(lat1).cos(lat2).sin²(Δlong/2) c = 2.atan2(√a, √(1−a)) d = R.c

Specified by:

calcDist in interface DistanceCalc

Overrides:

calcDist in class DistanceCalcEarth

calcDenormalizedDist

public double calcDenormalizedDist(double normedDist)

Description copied from interface: DistanceCalc

Inverse to calcNormalizedDist. Returned the length in meter.

Specified by:

calcDenormalizedDist in interface DistanceCalc

Overrides:

calcDenormalizedDist in class DistanceCalcEarth

calcNormalizedDist

public double calcNormalizedDist(double dist)

Returns the specified length in normalized meter.

Specified by:

calcNormalizedDist in interface DistanceCalc

Overrides:

calcNormalizedDist in class DistanceCalcEarth

calcNormalizedDist

public double calcNormalizedDist(double fromY,
                                 double fromX,
                                 double toY,
                                 double toX)

Calculates in normalized meter

Specified by:

calcNormalizedDist in interface DistanceCalc

Overrides:

calcNormalizedDist in class DistanceCalcEarth

toString

public String toString()

Overrides:

toString in class DistanceCalcEarth