org.zkoss.gmaps
Class GmapsUtil

java.lang.Object
  org.zkoss.gmaps.GmapsUtil

public class GmapsUtil
extends java.lang.Object

Utility class regrding Gmaps.

Since:

2.0_10

Author:

henrichen

Constructor Summary

GmapsUtil()

Method Summary

static double[]	getBounds(double lat, double lng, int width, int height, int zoomLevel) Returns the bounds per the given center latitude, longitude, view port width, view port height, and zoomLevel.
static int[]	latlngToXy(double lat, double lng, int zoomLevel) Convert the latitude and longitude to x, y pixels.
static double[]	xyToLatlng(int x, int y, int zoomLevel) Convert the x, y pixels to latitude and longitude.

Methods inherited from class java.lang.Object

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

Constructor Detail

GmapsUtil

public GmapsUtil()

Method Detail

latlngToXy

public static int[] latlngToXy(double lat,
                               double lng,
                               int zoomLevel)

Convert the latitude and longitude to x, y pixels. This is based on the Mercator Projection (check http://en.wikipedia.org/wiki/Mercator_projection) as used in Google Maps

Parameters:

lat - the latitude in degree

lng - the longitude in degree

zoomLevel - the zoom level of the map

Returns:

int[] with int[0] the x and int[1] the y

xyToLatlng

public static double[] xyToLatlng(int x,
                                  int y,
                                  int zoomLevel)

Convert the x, y pixels to latitude and longitude. This is based on the Mercator Projection (check http://en.wikipedia.org/wiki/Mercator_projection) as used in Google Maps.

Parameters:

x - the x in pixels

y - the y in pixels

zoomLevel - the zoom level of the map

Returns:

double[] with double[0] the latitude and double[1] the longitude

getBounds

public static double[] getBounds(double lat,
                                 double lng,
                                 int width,
                                 int height,
                                 int zoomLevel)

Returns the bounds per the given center latitude, longitude, view port width, view port height, and zoomLevel.

Parameters:

lat - the center latitude

lng - the center longitude

width - the view port width

height - the view port height

zoomLevel - the zoom level

Returns:

double[] with double[0] swlat, double[1] swlng, double[2] nelat, double[3] nelng