Package org.openstreetmap.josm.data.coor

Class QuadTiling

java.lang.Object

org.openstreetmap.josm.data.coor.QuadTiling

public final class QuadTiling
extends java.lang.Object

This class helps in tiling the world into multiple quad tiles.

Field Summary

Fields

Modifier and Type	Field	Description
static int	NR_LEVELS	The maximum number of levels to split the quads
static int	TILES_PER_LEVEL	How many tiles there are per level
static int	TILES_PER_LEVEL_SHIFT	The log(2) of how many tiles there are per level
static double	WORLD_PARTS	The number of parts the world is split into in each direction
static int	X_BIAS	The offset of the world in x direction
static int	X_PARTS	The size of the world in X direction
static int	Y_BIAS	The offset of the world in y direction
static int	Y_PARTS	The size of the world in y direction

Constructor Summary

Constructors

Modifier	Constructor	Description
private	QuadTiling()

Method Summary

Modifier and Type	Method	Description
static byte	index(double lat, double lon, int level)	Returns quad tiling index for given coordinates and level.
(package private) static long	lat2y(double lat)
(package private) static long	lon2x(double lon)
static LatLon	tile2LatLon(long quad)	Converts a tile index to a lat/lon position

Methods inherited from class java.lang.Object

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

Field Detail

NR_LEVELS

public static final int NR_LEVELS

The maximum number of levels to split the quads

See Also:

Constant Field Values

WORLD_PARTS

public static final double WORLD_PARTS

The number of parts the world is split into in each direction

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Constant Field Values

TILES_PER_LEVEL_SHIFT

public static final int TILES_PER_LEVEL_SHIFT

The log(2) of how many tiles there are per level

See Also:

Constant Field Values

TILES_PER_LEVEL

public static final int TILES_PER_LEVEL

How many tiles there are per level

See Also:

Constant Field Values

X_PARTS

public static final int X_PARTS

The size of the world in X direction

See Also:

Constant Field Values

X_BIAS

public static final int X_BIAS

The offset of the world in x direction

See Also:

Constant Field Values

Y_PARTS

public static final int Y_PARTS

The size of the world in y direction

See Also:

Constant Field Values

Y_BIAS

public static final int Y_BIAS

The offset of the world in y direction

See Also:

Constant Field Values

Constructor Detail

QuadTiling

private QuadTiling()

Method Detail

tile2LatLon

public static LatLon tile2LatLon(long quad)

Converts a tile index to a lat/lon position

Parameters:

quad - The tile to convert

Returns:

The lat/lon position of that tile

lon2x

static long lon2x(double lon)

lat2y

static long lat2y(double lat)

index

public static byte index(double lat,
                         double lon,
                         int level)

Returns quad tiling index for given coordinates and level.

Parameters:

lat - latitude

lon - longitude

level - level

Returns:

quad tiling index for given coordinates and level.

Since:

6171