org.jdesktop.swingx.mapviewer.util

Class GeoUtil

java.lang.Object

org.jdesktop.swingx.mapviewer.util.GeoUtil

public final class GeoUtil
extends Object

These are math utilities for converting between pixels, tiles, and geographic coordinates. Implements a Google Maps style mercator projection.

Author:

joshy

Constructor Summary

Constructors

Constructor and Description
GeoUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static Point2D	getBitmapCoordinate(double latitude, double longitude, int zoomLevel, TileFactoryInfo info) Given a position (latitude/longitude pair) and a zoom level, return the appropriate point in pixels.
static Point2D	getBitmapCoordinate(GeoPosition c, int zoomLevel, TileFactoryInfo info) Given a position (latitude/longitude pair) and a zoom level, return the appropriate point in pixels.
static GeoBounds	getMapBounds(JXMapViewer mapViewer) Gets the map bounds.
static Dimension	getMapSize(int zoom, TileFactoryInfo info)
static GeoPosition	getPosition(Point2D pixelCoordinate, int zoom, TileFactoryInfo info) Convert an on screen pixel coordinate and a zoom level to a geo position
static boolean	isValidTile(int x, int y, int zoomLevel, TileFactoryInfo info)

Methods inherited from class java.lang.Object

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

Constructor Detail

GeoUtil

public GeoUtil()

Method Detail

getMapSize

public static Dimension getMapSize(int zoom,
                   TileFactoryInfo info)

Parameters:

zoom - the zoom level

info - the tile factory info

Returns:

the size of the map at the given zoom, in tiles (num tiles tall by num tiles wide)

isValidTile

public static boolean isValidTile(int x,
                  int y,
                  int zoomLevel,
                  TileFactoryInfo info)

Parameters:

x - the x value

y - the y value

zoomLevel - the zoom level

info - the tile factory info

Returns:

true if this point in tiles is valid at this zoom level. For example, if the zoom level is 0 (zoomed all the way out, where there is only one tile), then x,y must be 0,0

getBitmapCoordinate

public static Point2D getBitmapCoordinate(GeoPosition c,
                          int zoomLevel,
                          TileFactoryInfo info)

Given a position (latitude/longitude pair) and a zoom level, return the appropriate point in pixels. The zoom level is necessary because pixel coordinates are in terms of the zoom level

Parameters:

c - A lat/lon pair

zoomLevel - the zoom level to extract the pixel coordinate for

info - the tile factory info

Returns:

the coordinate

getBitmapCoordinate

public static Point2D getBitmapCoordinate(double latitude,
                          double longitude,
                          int zoomLevel,
                          TileFactoryInfo info)

Given a position (latitude/longitude pair) and a zoom level, return the appropriate point in pixels. The zoom level is necessary because pixel coordinates are in terms of the zoom level

Parameters:

latitude - the latitude

longitude - the longitude

zoomLevel - the zoom level to extract the pixel coordinate for

info - the tile factory info

Returns:

the coordinate

getPosition

public static GeoPosition getPosition(Point2D pixelCoordinate,
                      int zoom,
                      TileFactoryInfo info)

Convert an on screen pixel coordinate and a zoom level to a geo position

Parameters:

pixelCoordinate - the coordinate in pixels

zoom - the zoom level

info - the tile factory info

Returns:

a geo position

getMapBounds

public static GeoBounds getMapBounds(JXMapViewer mapViewer)

Gets the map bounds.

Parameters:

mapViewer - The map viewer.

Returns:

Returns the bounds.