Package nl.bebr.mapviewer.data.util

Class GeoUtil

java.lang.Object

nl.bebr.mapviewer.data.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	Description
GeoUtil()

Method Summary

Modifier and Type	Method	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(MapViewer<?,Tile<?>> mapViewer)	Gets the map bounds.
static Dimension	getMapSize(int zoom, TileFactoryInfo info)
static GeoPosition	getPosition(Point2D pixelCoordinate, int zoom, TileFactoryInfo info)
static GeoPosition	getPositionForAddress(String[] fields)
static GeoPosition	getPositionForAddress(String street, String city, String state)	Convert a street address into a 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)

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)

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

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:

double - latitude

double - longitude

zoomLevel - the zoom level to extract the pixel coordinate for

getPosition

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

getPositionForAddress

public static GeoPosition getPositionForAddress(String[] fields)
                                         throws IOException

Throws:

IOException

getPositionForAddress

public static GeoPosition getPositionForAddress(String street,
                                                String city,
                                                String state)
                                         throws IOException

Convert a street address into a position. Uses the Yahoo GeoCoder. You must supply your own yahoo id.

Parameters:

street - Street

city - City

state - State (must be a US state)

Returns:

the position of this street address

Throws:

IOException - if the request fails.

getMapBounds

public static GeoBounds getMapBounds(MapViewer<?,Tile<?>> mapViewer)

Gets the map bounds.

Parameters:

mapViewer - The map viewer.

Returns:

Returns the bounds.