de.cismet.cismap.commons.raster.wms.googlemaps

Class GoogleTileUtils

java.lang.Object

de.cismet.cismap.commons.raster.wms.googlemaps.GoogleTileUtils

public class GoogleTileUtils
extends Object

A utility class to assist in encoding and decoding google tile references.

For reasons of my own longitude is treated as being between -180 and +180 and internally latitude is treated as being from -1 to +1 and then converted to a mercator projection before return.

All rectangles are sorted so the width and height are +ve

Version:

$Revision$, $Date$

Author:

thorsten.hell@cismet.de

Method Summary

Modifier and Type	Method and Description
static BufferedImage	getDebugTileFor(int x, int y, int zoom) Returns a buffered image with the corner lat/lon,x,y and zoom level written on it.
static BufferedImage	getDebugTileFor(String keyholeString) Returns a buffered image with the corner lat/lon,keyhole id and zoom level written on it.
static Rectangle2D.Double	getLatLong(int x, int y, int zoom) returns a Rectangle2D with x = lon, y = lat, width=lonSpan, height=latSpan for an x,y,zoom as used by google.
static Rectangle2D.Double	getLatLong(String keyholeStr) returns a Rectangle2D with x = lon, y = lat, width=lonSpan, height=latSpan for a keyhole string.
static String	getTileRef(double lon, double lat, int zoom) returns a keyhole string for a longitude (x), latitude (y), and zoom.
static int	getTileZoom(String keyHoleString) returns the Google zoom level for the keyhole string.
static void	main(String[] args) Tests.

Methods inherited from class java.lang.Object

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

Method Detail

getDebugTileFor

public static BufferedImage getDebugTileFor(String keyholeString)

Returns a buffered image with the corner lat/lon,keyhole id and zoom level written on it.

Parameters:

keyholeString - the keyhole string to return the image for.

Returns:

DOCUMENT ME!

getDebugTileFor

public static BufferedImage getDebugTileFor(int x,
                                            int y,
                                            int zoom)

Returns a buffered image with the corner lat/lon,x,y and zoom level written on it.

Parameters:

x - DOCUMENT ME!

y - DOCUMENT ME!

zoom - DOCUMENT ME!

Returns:

DOCUMENT ME!

getLatLong

public static Rectangle2D.Double getLatLong(String keyholeStr)

returns a Rectangle2D with x = lon, y = lat, width=lonSpan, height=latSpan for a keyhole string.

Parameters:

keyholeStr - DOCUMENT ME!

Returns:

DOCUMENT ME!

Throws:

RuntimeException - DOCUMENT ME!

getLatLong

public static Rectangle2D.Double getLatLong(int x,
                                            int y,
                                            int zoom)

returns a Rectangle2D with x = lon, y = lat, width=lonSpan, height=latSpan for an x,y,zoom as used by google.

Parameters:

x - DOCUMENT ME!

y - DOCUMENT ME!

zoom - DOCUMENT ME!

Returns:

DOCUMENT ME!

getTileRef

public static String getTileRef(double lon,
                                double lat,
                                int zoom)

returns a keyhole string for a longitude (x), latitude (y), and zoom.

Parameters:

lon - DOCUMENT ME!

lat - DOCUMENT ME!

zoom - DOCUMENT ME!

Returns:

DOCUMENT ME!

getTileZoom

public static int getTileZoom(String keyHoleString)

returns the Google zoom level for the keyhole string.

Parameters:

keyHoleString - DOCUMENT ME!

Returns:

DOCUMENT ME!

main

public static void main(String[] args)

Tests.

Parameters:

args - DOCUMENT ME!