Package cn.mapway.common.geo.gdal

Class WebMercator

java.lang.Object

cn.mapway.common.geo.gdal.WebMercator

public class WebMercator
extends Object

WebMercator tools for web mercator https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames some information about tile server https://www.maptiler.com/google-maps-coordinates-tile-bounds-projection/#0/-140.84/67.89

Author:

zhang

Field Summary

Fields

Modifier and Type	Field	Description
static final long	EARTH_RADIUS
static final double	initialResolution
static final double	originShift
static final int	SRC_WEB_MERCATOR
static final int	SRC_WGS84

Constructor Summary

Constructors

Constructor	Description
WebMercator()

Method Summary

Modifier and Type	Method	Description
static double	resolution(int zoom)
static cn.mapway.geo.shared.vector.Box	tileBoundMercator(long tileX, long tileY, int zoom)	tile 左上角的 墨卡托坐标 | | | -------+------- EQUATOR_LENGTH | | |
static cn.mapway.geo.shared.vector.Box	tileBoundWgs84(long tileX, long tileY, int zoom)	tile的范围
static cn.mapway.geo.shared.vector.Box	tileBoundWgs84(TileNo tileNo)	tile的wgs84 范围
static TileNo	tileNoFromWgs84(double lat, double lng, int zoom)	经纬度坐标 所在的tile索引 参考 https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
static double	zoomResolution(double latitude, int zoom)	zoom level 的分辨率 单位米

Methods inherited from class java.lang.Object

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

Field Details

SRC_WEB_MERCATOR

public static final int SRC_WEB_MERCATOR

See Also:

• Constant Field Values

SRC_WGS84

public static final int SRC_WGS84

See Also:

• Constant Field Values

EARTH_RADIUS

public static final long EARTH_RADIUS

See Also:

• Constant Field Values

initialResolution

public static final double initialResolution

See Also:

• Constant Field Values

originShift

public static final double originShift

See Also:

• Constant Field Values

Constructor Details

WebMercator

public WebMercator()

Method Details

zoomResolution

public static double zoomResolution(double latitude,
 int zoom)

zoom level 的分辨率 单位米

Parameters:

zoom -

Returns:

resolution

public static double resolution(int zoom)

tileBoundWgs84

public static cn.mapway.geo.shared.vector.Box tileBoundWgs84(TileNo tileNo)

tile的wgs84 范围

Parameters:

tileNo -

Returns:

tileBoundWgs84

public static cn.mapway.geo.shared.vector.Box tileBoundWgs84(long tileX,
 long tileY,
 int zoom)

tile的范围

Parameters:

tileX -

tileY -

zoom -

Returns:

tileBoundMercator

public static cn.mapway.geo.shared.vector.Box tileBoundMercator(long tileX,
 long tileY,
 int zoom)

tile 左上角的 墨卡托坐标 | | | -------+------- EQUATOR_LENGTH | | |

Parameters:

tileX -

tileY -

zoom -

Returns:

tileNoFromWgs84

public static TileNo tileNoFromWgs84(double lat,
 double lng,
 int zoom)

经纬度坐标 所在的tile索引 参考 https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames

Parameters:

lat -

lng -

zoom -

Returns: