com.graphhopper.geohash

Class LinearKeyAlgo

java.lang.Object

com.graphhopper.geohash.LinearKeyAlgo

All Implemented Interfaces:

KeyAlgo

public class LinearKeyAlgo
extends Object
implements KeyAlgo

This class maps lat,lon to a (tile)number unlike SpatialKeyAlgo.

Author:

Peter Karich

Constructor Summary

Constructors

Constructor and Description
LinearKeyAlgo(int latUnits, int lonUnits)

Method Summary

Modifier and Type	Method and Description
void	decode(long linearKey, GHPoint latLon) This method returns latitude and longitude via latLon - calculated from specified linearKey
long	encode(double lat, double lon) Take latitude and longitude as input.
long	encode(GHPoint coord)
double	getLatDelta()
double	getLonDelta()
LinearKeyAlgo	setBounds(BBox bounds)
LinearKeyAlgo	setBounds(double minLonInit, double maxLonInit, double minLatInit, double maxLatInit) Sets the bounds of the underlying key algorithm.
protected void	setWorldBounds()

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearKeyAlgo

public LinearKeyAlgo(int latUnits,
                     int lonUnits)

Method Detail

setBounds

public LinearKeyAlgo setBounds(double minLonInit,
                               double maxLonInit,
                               double minLatInit,
                               double maxLatInit)

Description copied from interface: KeyAlgo

Sets the bounds of the underlying key algorithm.

Specified by:

setBounds in interface KeyAlgo

setBounds

public LinearKeyAlgo setBounds(BBox bounds)

setWorldBounds

protected void setWorldBounds()

encode

public long encode(GHPoint coord)

Specified by:

encode in interface KeyAlgo

encode

public final long encode(double lat,
                         double lon)

Take latitude and longitude as input.

Specified by:

encode in interface KeyAlgo

Returns:

the linear key

decode

public final void decode(long linearKey,
                         GHPoint latLon)

This method returns latitude and longitude via latLon - calculated from specified linearKey

Specified by:

decode in interface KeyAlgo

Parameters:

linearKey - is the input

getLatDelta

public double getLatDelta()

getLonDelta

public double getLonDelta()