com.ontimize.util.gis.extension.google
Class GoogleTileUtils

java.lang.Object
  com.ontimize.util.gis.extension.google.GoogleTileUtils

public class GoogleTileUtils
extends java.lang.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

Method Summary

static java.awt.image.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 java.awt.image.BufferedImage	getDebugTileFor(java.lang.String keyholeString) Returns a buffered image with the corner lat/lon,keyhole id and zoom level written on it.
static java.awt.geom.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 java.awt.geom.Rectangle2D.Double	getLatLong(java.lang.String keyholeStr) returns a Rectangle2D with x = lon, y = lat, width=lonSpan, height=latSpan for a keyhole string.
static java.lang.String	getTileRef(double lon, double lat, int zoom) returns a keyhole string for a longitude (x), latitude (y), and zoom
static int	getTileZoom(java.lang.String keyHoleString) returns the Google zoom level for the keyhole string.
static void	main(java.lang.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 java.awt.image.BufferedImage getDebugTileFor(java.lang.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:

Requested buffered image

getDebugTileFor

public static java.awt.image.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.

getLatLong

public static java.awt.geom.Rectangle2D.Double getLatLong(java.lang.String keyholeStr)

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

getLatLong

public static java.awt.geom.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.

getTileRef

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

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

getTileZoom

public static int getTileZoom(java.lang.String keyHoleString)

returns the Google zoom level for the keyhole string.

main

public static void main(java.lang.String[] args)

Tests