MercatorProjection (vtm 0.9.1 API)

java.lang.Object
- org.oscim.core.MercatorProjection

```
public final class MercatorProjection
extends java.lang.Object
```
An implementation of the spherical Mercator projection.
There are generally two methods for each operation: one taking a byte zoom level and a parallel one taking a double scale. The scale is Math.pow(2, zoomLevel) for a given zoom level, but the operations take intermediate values as well. The zoom level operation is a little faster as it can make use of shift operations, the scale operation offers greater flexibility in computing the values for intermediate zoom levels.

Field Summary

Fields
Modifier and Type	Field and Description
`static double`	`EARTH_CIRCUMFERENCE` The circumference of the earth at the equator in meters.
`static double`	`LATITUDE_MAX` Maximum possible latitude coordinate of the map.
`static double`	`LATITUDE_MIN` Minimum possible latitude coordinate of the map.
`static double`	`LONGITUDE_MAX` Maximum possible longitude coordinate of the map.
`static double`	`LONGITUDE_MIN` Minimum possible longitude coordinate of the map.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static GeoPoint`	`fromPixels(double pixelX, double pixelY, long mapSize)` Get GeoPoint from Pixels.
`static GeoPoint`	`fromPixelsWithScale(double pixelX, double pixelY, double scale)` Get GeoPoint from Pixels.
`static long`	`getMapSize(byte zoomLevel)`
`static long`	`getMapSizeWithScale(double scale)`
`static Point`	`getPixel(GeoPoint geoPoint, long mapSize)`
`static Point`	`getPixelAbsolute(GeoPoint geoPoint, long mapSize)` Calculates the absolute pixel position for a map size and tile size
`static Point`	`getPixelRelative(GeoPoint geoPoint, long mapSize, double x, double y)` Calculates the absolute pixel position for a map size and tile size relative to origin
`static Point`	`getPixelRelative(GeoPoint geoPoint, long mapSize, Point origin)` Calculates the absolute pixel position for a map size and tile size relative to origin
`static Point`	`getPixelRelativeToTile(GeoPoint geoPoint, Tile tile)` Calculates the absolute pixel position for a tile and tile size relative to origin
`static Point`	`getPixelWithScale(GeoPoint geoPoint, double scale)`
`static double`	`groundResolution(double latitude, long mapSize)` Calculates the distance on the ground that is represented by a single pixel on the map.
`static float`	`groundResolution(MapPosition pos)`
`static double`	`groundResolutionWithScale(double latitude, double scale)` Calculates the distance on the ground that is represented by a single pixel on the map.
`static double`	`latitudeToPixelY(double latitude, byte zoomLevel)` Converts a latitude coordinate (in degrees) to a pixel Y coordinate at a certain zoom level.
`static double`	`latitudeToPixelY(double latitude, long mapSize)` Converts a latitude coordinate (in degrees) to a pixel Y coordinate at a certain map size.
`static double`	`latitudeToPixelYWithScale(double latitude, double scale)` Converts a latitude coordinate (in degrees) to a pixel Y coordinate at a certain scale.
`static int`	`latitudeToTileY(double latitude, byte zoomLevel)` Converts a latitude coordinate (in degrees) to a tile Y number at a certain zoom level.
`static int`	`latitudeToTileYWithScale(double latitude, double scale)` Converts a latitude coordinate (in degrees) to a tile Y number at a certain scale.
`static double`	`latitudeToY(double latitude)` Projects a latitude coordinate (in degrees) to the range [0.0,1.0]
`static double`	`limitLatitude(double latitude)`
`static double`	`limitLongitude(double longitude)`
`static double`	`longitudeToPixelX(double longitude, byte zoomLevel)` Converts a longitude coordinate (in degrees) to a pixel X coordinate at a certain zoom level.
`static double`	`longitudeToPixelX(double longitude, long mapSize)` Converts a longitude coordinate (in degrees) to a pixel X coordinate at a certain map size.
`static double`	`longitudeToPixelXWithScale(double longitude, double scale)` Converts a longitude coordinate (in degrees) to a pixel X coordinate at a certain scale factor.
`static int`	`longitudeToTileX(double longitude, byte zoomLevel)` Converts a longitude coordinate (in degrees) to the tile X number at a certain zoom level.
`static int`	`longitudeToTileXWithScale(double longitude, double scale)` Converts a longitude coordinate (in degrees) to the tile X number at a certain scale factor.
`static double`	`longitudeToX(double longitude)` Projects a longitude coordinate (in degrees) to the range [0.0,1.0]
`static double`	`metersToPixels(float meters, double latitude, long mapSize)` Converts meters to pixels at latitude for zoom-level.
`static double`	`metersToPixelsWithScale(float meters, double latitude, double scale)` Converts meters to pixels at latitude for zoom-level.
`static double`	`pixelXToLongitude(double pixelX, long mapSize)` Converts a pixel X coordinate at a certain map size to a longitude coordinate.
`static double`	`pixelXToLongitudeWithScale(double pixelX, double scale)` Converts a pixel X coordinate at a certain scale to a longitude coordinate.
`static int`	`pixelXToTileX(double pixelX, byte zoomLevel)` Converts a pixel X coordinate to the tile X number.
`static int`	`pixelXToTileXWithScale(double pixelX, double scale)` Converts a pixel X coordinate to the tile X number.
`static double`	`pixelYToLatitude(double pixelY, long mapSize)` Converts a pixel Y coordinate at a certain map size to a latitude coordinate.
`static double`	`pixelYToLatitudeWithScale(double pixelY, double scale)` Converts a pixel Y coordinate at a certain scale to a latitude coordinate.
`static int`	`pixelYToTileY(double pixelY, byte zoomLevel)` Converts a pixel Y coordinate to the tile Y number.
`static int`	`pixelYToTileYWithScale(double pixelY, double scale)` Converts a pixel Y coordinate to the tile Y number.
`static void`	`project(double latitude, double longitude, double[] out, int pos)`
`static void`	`project(GeoPoint p, double[] out, int pos)`
`static Point`	`project(GeoPoint p, Point reuse)`
`static double`	`scaleToZoomLevel(double scale)` Converts a scale factor to a zoomLevel.
`static long`	`tileToPixel(long tileNumber)`
`static double`	`tileXToLongitude(long tileX, byte zoomLevel)` Converts a tile X number at a certain zoom level to a longitude coordinate.
`static double`	`tileXToLongitudeWithScale(long tileX, double scale)` Converts a tile X number at a certain scale to a longitude coordinate.
`static double`	`tileYToLatitude(long tileY, byte zoomLevel)` Converts a tile Y number at a certain zoom level to a latitude coordinate.
`static double`	`tileYToLatitudeWithScale(long tileY, double scale)` Converts a tile Y number at a certain scale to a latitude coordinate.
`static double`	`toLatitude(double y)`
`static double`	`toLongitude(double x)`
`static double`	`wrapLongitude(double longitude)`
`static double`	`zoomLevelToScale(byte zoomLevel)` Converts a zoom level to a scale factor.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - EARTH_CIRCUMFERENCE
```
public static final double EARTH_CIRCUMFERENCE
```
    The circumference of the earth at the equator in meters.
    
    See Also:
    
    Constant Field Values
  - LATITUDE_MAX
```
public static final double LATITUDE_MAX
```
    Maximum possible latitude coordinate of the map.
    
    See Also:
    
    Constant Field Values
  - LATITUDE_MIN
```
public static final double LATITUDE_MIN
```
    Minimum possible latitude coordinate of the map.
    
    See Also:
    
    Constant Field Values
  - LONGITUDE_MAX
```
public static final double LONGITUDE_MAX
```
    Maximum possible longitude coordinate of the map.
    
    See Also:
    
    Constant Field Values
  - LONGITUDE_MIN
```
public static final double LONGITUDE_MIN
```
    Minimum possible longitude coordinate of the map.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - fromPixelsWithScale
```
public static GeoPoint fromPixelsWithScale(double pixelX,
                                           double pixelY,
                                           double scale)
```
    Get GeoPoint from Pixels.
  - fromPixels
```
public static GeoPoint fromPixels(double pixelX,
                                  double pixelY,
                                  long mapSize)
```
    Get GeoPoint from Pixels.
  - getMapSizeWithScale
```
public static long getMapSizeWithScale(double scale)
```
    Parameters:
    
    scale - the scale factor for which the size of the world map should be returned.
    
    Returns:
    
    the horizontal and vertical size of the map in pixel at the given scale.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the given scale factor is < 1
  - getMapSize
```
public static long getMapSize(byte zoomLevel)
```
    Parameters:
    
    zoomLevel - the zoom level for which the size of the world map should be returned.
    
    Returns:
    
    the horizontal and vertical size of the map in pixel at the given zoom level.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the given zoom level is negative.
  - getPixelWithScale
```
public static Point getPixelWithScale(GeoPoint geoPoint,
                                      double scale)
```
  - getPixel
```
public static Point getPixel(GeoPoint geoPoint,
                             long mapSize)
```
  - getPixelAbsolute
```
public static Point getPixelAbsolute(GeoPoint geoPoint,
                                     long mapSize)
```
    Calculates the absolute pixel position for a map size and tile size
    
    Parameters:
    
    geoPoint - the geographic position.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the absolute pixel coordinates (for world)
  - getPixelRelative
```
public static Point getPixelRelative(GeoPoint geoPoint,
                                     long mapSize,
                                     double x,
                                     double y)
```
    Calculates the absolute pixel position for a map size and tile size relative to origin
    
    Parameters:
    
    geoPoint - the geographic position.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the relative pixel position to the origin values (e.g. for a tile)
  - getPixelRelative
```
public static Point getPixelRelative(GeoPoint geoPoint,
                                     long mapSize,
                                     Point origin)
```
    Calculates the absolute pixel position for a map size and tile size relative to origin
    
    Parameters:
    
    geoPoint - the geographic position.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the relative pixel position to the origin values (e.g. for a tile)
  - getPixelRelativeToTile
```
public static Point getPixelRelativeToTile(GeoPoint geoPoint,
                                           Tile tile)
```
    Calculates the absolute pixel position for a tile and tile size relative to origin
    
    Parameters:
    
    geoPoint - the geographic position.
    
    tile - tile
    
    Returns:
    
    the relative pixel position to the origin values (e.g. for a tile)
  - groundResolutionWithScale
```
public static double groundResolutionWithScale(double latitude,
                                               double scale)
```
    Calculates the distance on the ground that is represented by a single pixel on the map.
    
    Parameters:
    
    latitude - the latitude coordinate at which the resolution should be calculated.
    
    scale - the map scale at which the resolution should be calculated.
    
    Returns:
    
    the ground resolution at the given latitude and scale.
  - groundResolution
```
public static float groundResolution(MapPosition pos)
```
  - groundResolution
```
public static double groundResolution(double latitude,
                                      long mapSize)
```
    Calculates the distance on the ground that is represented by a single pixel on the map.
    
    Parameters:
    
    latitude - the latitude coordinate at which the resolution should be calculated.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the ground resolution at the given latitude and map size.
  - latitudeToPixelYWithScale
```
public static double latitudeToPixelYWithScale(double latitude,
                                               double scale)
```
    Converts a latitude coordinate (in degrees) to a pixel Y coordinate at a certain scale.
    
    Parameters:
    
    latitude - the latitude coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the pixel Y coordinate of the latitude value.
  - latitudeToPixelY
```
public static double latitudeToPixelY(double latitude,
                                      byte zoomLevel)
```
    Converts a latitude coordinate (in degrees) to a pixel Y coordinate at a certain zoom level.
    
    Parameters:
    
    latitude - the latitude coordinate that should be converted.
    
    zoomLevel - the zoom level at which the coordinate should be converted.
    
    Returns:
    
    the pixel Y coordinate of the latitude value.
  - latitudeToPixelY
```
public static double latitudeToPixelY(double latitude,
                                      long mapSize)
```
    Converts a latitude coordinate (in degrees) to a pixel Y coordinate at a certain map size.
    
    Parameters:
    
    latitude - the latitude coordinate that should be converted.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the pixel Y coordinate of the latitude value.
  - latitudeToTileYWithScale
```
public static int latitudeToTileYWithScale(double latitude,
                                           double scale)
```
    Converts a latitude coordinate (in degrees) to a tile Y number at a certain scale.
    
    Parameters:
    
    latitude - the latitude coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the tile Y number of the latitude value.
  - latitudeToTileY
```
public static int latitudeToTileY(double latitude,
                                  byte zoomLevel)
```
    Converts a latitude coordinate (in degrees) to a tile Y number at a certain zoom level.
    
    Parameters:
    
    latitude - the latitude coordinate that should be converted.
    
    zoomLevel - the zoom level at which the coordinate should be converted.
    
    Returns:
    
    the tile Y number of the latitude value.
  - latitudeToY
```
public static double latitudeToY(double latitude)
```
    Projects a latitude coordinate (in degrees) to the range [0.0,1.0]
    
    Parameters:
    
    latitude - the latitude coordinate that should be converted.
    
    Returns:
    
    the position.
  - limitLatitude
```
public static double limitLatitude(double latitude)
```
    Parameters:
    
    latitude - the latitude value which should be checked.
    
    Returns:
    
    the given latitude value, limited to the possible latitude range.
  - limitLongitude
```
public static double limitLongitude(double longitude)
```
    Parameters:
    
    longitude - the longitude value which should be checked.
    
    Returns:
    
    the given longitude value, limited to the possible longitude range.
  - longitudeToPixelXWithScale
```
public static double longitudeToPixelXWithScale(double longitude,
                                                double scale)
```
    Converts a longitude coordinate (in degrees) to a pixel X coordinate at a certain scale factor.
    
    Parameters:
    
    longitude - the longitude coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the pixel X coordinate of the longitude value.
  - longitudeToPixelX
```
public static double longitudeToPixelX(double longitude,
                                       byte zoomLevel)
```
    Converts a longitude coordinate (in degrees) to a pixel X coordinate at a certain zoom level.
    
    Parameters:
    
    longitude - the longitude coordinate that should be converted.
    
    zoomLevel - the zoom level at which the coordinate should be converted.
    
    Returns:
    
    the pixel X coordinate of the longitude value.
  - longitudeToPixelX
```
public static double longitudeToPixelX(double longitude,
                                       long mapSize)
```
    Converts a longitude coordinate (in degrees) to a pixel X coordinate at a certain map size.
    
    Parameters:
    
    longitude - the longitude coordinate that should be converted.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the pixel X coordinate of the longitude value.
  - longitudeToTileXWithScale
```
public static int longitudeToTileXWithScale(double longitude,
                                            double scale)
```
    Converts a longitude coordinate (in degrees) to the tile X number at a certain scale factor.
    
    Parameters:
    
    longitude - the longitude coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the tile X number of the longitude value.
  - longitudeToTileX
```
public static int longitudeToTileX(double longitude,
                                   byte zoomLevel)
```
    Converts a longitude coordinate (in degrees) to the tile X number at a certain zoom level.
    
    Parameters:
    
    longitude - the longitude coordinate that should be converted.
    
    zoomLevel - the zoom level at which the coordinate should be converted.
    
    Returns:
    
    the tile X number of the longitude value.
  - longitudeToX
```
public static double longitudeToX(double longitude)
```
    Projects a longitude coordinate (in degrees) to the range [0.0,1.0]
    
    Parameters:
    
    longitude - the longitude coordinate that should be converted.
    
    Returns:
    
    the position.
  - metersToPixelsWithScale
```
public static double metersToPixelsWithScale(float meters,
                                             double latitude,
                                             double scale)
```
    Converts meters to pixels at latitude for zoom-level.
    
    Parameters:
    
    meters - the meters to convert
    
    latitude - the latitude for the conversion.
    
    scale - the scale factor for the conversion.
    
    Returns:
    
    pixels that represent the meters at the given zoom-level and latitude.
  - metersToPixels
```
public static double metersToPixels(float meters,
                                    double latitude,
                                    long mapSize)
```
    Converts meters to pixels at latitude for zoom-level.
    
    Parameters:
    
    meters - the meters to convert
    
    latitude - the latitude for the conversion.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    pixels that represent the meters at the given zoom-level and latitude.
  - pixelXToLongitudeWithScale
```
public static double pixelXToLongitudeWithScale(double pixelX,
                                                double scale)
```
    Converts a pixel X coordinate at a certain scale to a longitude coordinate.
    
    Parameters:
    
    pixelX - the pixel X coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the longitude value of the pixel X coordinate.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the given pixelX coordinate is invalid.
  - pixelXToLongitude
```
public static double pixelXToLongitude(double pixelX,
                                       long mapSize)
```
    Converts a pixel X coordinate at a certain map size to a longitude coordinate.
    
    Parameters:
    
    pixelX - the pixel X coordinate that should be converted.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the longitude value of the pixel X coordinate.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the given pixelX coordinate is invalid.
  - pixelXToTileXWithScale
```
public static int pixelXToTileXWithScale(double pixelX,
                                         double scale)
```
    Converts a pixel X coordinate to the tile X number.
    
    Parameters:
    
    pixelX - the pixel X coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the tile X number.
  - pixelXToTileX
```
public static int pixelXToTileX(double pixelX,
                                byte zoomLevel)
```
    Converts a pixel X coordinate to the tile X number.
    
    Parameters:
    
    pixelX - the pixel X coordinate that should be converted.
    
    zoomLevel - the zoom level at which the coordinate should be converted.
    
    Returns:
    
    the tile X number.
  - pixelYToLatitudeWithScale
```
public static double pixelYToLatitudeWithScale(double pixelY,
                                               double scale)
```
    Converts a pixel Y coordinate at a certain scale to a latitude coordinate.
    
    Parameters:
    
    pixelY - the pixel Y coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the latitude value of the pixel Y coordinate.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the given pixelY coordinate is invalid.
  - pixelYToLatitude
```
public static double pixelYToLatitude(double pixelY,
                                      long mapSize)
```
    Converts a pixel Y coordinate at a certain map size to a latitude coordinate.
    
    Parameters:
    
    pixelY - the pixel Y coordinate that should be converted.
    
    mapSize - precomputed size of map.
    
    Returns:
    
    the latitude value of the pixel Y coordinate.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the given pixelY coordinate is invalid.
  - pixelYToTileYWithScale
```
public static int pixelYToTileYWithScale(double pixelY,
                                         double scale)
```
    Converts a pixel Y coordinate to the tile Y number.
    
    Parameters:
    
    pixelY - the pixel Y coordinate that should be converted.
    
    scale - the scale factor at which the coordinate should be converted.
    
    Returns:
    
    the tile Y number.
  - pixelYToTileY
```
public static int pixelYToTileY(double pixelY,
                                byte zoomLevel)
```
    Converts a pixel Y coordinate to the tile Y number.
    
    Parameters:
    
    pixelY - the pixel Y coordinate that should be converted.
    
    zoomLevel - the zoom level at which the coordinate should be converted.
    
    Returns:
    
    the tile Y number.
  - project
```
public static Point project(GeoPoint p,
                            Point reuse)
```
  - project
```
public static void project(GeoPoint p,
                           double[] out,
                           int pos)
```
  - project
```
public static void project(double latitude,
                           double longitude,
                           double[] out,
                           int pos)
```
  - scaleToZoomLevel
```
public static double scaleToZoomLevel(double scale)
```
    Converts a scale factor to a zoomLevel. Note that this will return a double, as the scale factors cover the intermediate zoom levels as well.
    
    Parameters:
    
    scale - the scale factor to convert to a zoom level.
    
    Returns:
    
    the zoom level.
  - tileToPixel
```
public static long tileToPixel(long tileNumber)
```
    Parameters:
    
    tileNumber - the tile number that should be converted.
    
    Returns:
    
    the pixel coordinate for the given tile number.
  - tileXToLongitudeWithScale
```
public static double tileXToLongitudeWithScale(long tileX,
                                               double scale)
```
    Converts a tile X number at a certain scale to a longitude coordinate.
    
    Parameters:
    
    tileX - the tile X number that should be converted.
    
    scale - the scale factor at which the number should be converted.
    
    Returns:
    
    the longitude value of the tile X number.
  - tileXToLongitude
```
public static double tileXToLongitude(long tileX,
                                      byte zoomLevel)
```
    Converts a tile X number at a certain zoom level to a longitude coordinate.
    
    Parameters:
    
    tileX - the tile X number that should be converted.
    
    zoomLevel - the zoom level at which the number should be converted.
    
    Returns:
    
    the longitude value of the tile X number.
  - tileYToLatitudeWithScale
```
public static double tileYToLatitudeWithScale(long tileY,
                                              double scale)
```
    Converts a tile Y number at a certain scale to a latitude coordinate.
    
    Parameters:
    
    tileY - the tile Y number that should be converted.
    
    scale - the scale factor at which the number should be converted.
    
    Returns:
    
    the latitude value of the tile Y number.
  - tileYToLatitude
```
public static double tileYToLatitude(long tileY,
                                     byte zoomLevel)
```
    Converts a tile Y number at a certain zoom level to a latitude coordinate.
    
    Parameters:
    
    tileY - the tile Y number that should be converted.
    
    zoomLevel - the zoom level at which the number should be converted.
    
    Returns:
    
    the latitude value of the tile Y number.
  - toLatitude
```
public static double toLatitude(double y)
```
  - toLongitude
```
public static double toLongitude(double x)
```
  - wrapLongitude
```
public static double wrapLongitude(double longitude)
```
  - zoomLevelToScale
```
public static double zoomLevelToScale(byte zoomLevel)
```
    Converts a zoom level to a scale factor.
    
    Parameters:
    
    zoomLevel - the zoom level to convert.
    
    Returns:
    
    the corresponding scale factor.

Class MercatorProjection

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

EARTH_CIRCUMFERENCE

LATITUDE_MAX

LATITUDE_MIN

LONGITUDE_MAX

LONGITUDE_MIN

Method Detail

fromPixelsWithScale

fromPixels

getMapSizeWithScale

getMapSize

getPixelWithScale

getPixel

getPixelAbsolute

getPixelRelative

getPixelRelative

getPixelRelativeToTile

groundResolutionWithScale

groundResolution

groundResolution

latitudeToPixelYWithScale

latitudeToPixelY

latitudeToPixelY

latitudeToTileYWithScale

latitudeToTileY

latitudeToY

limitLatitude

limitLongitude

longitudeToPixelXWithScale

longitudeToPixelX

longitudeToPixelX

longitudeToTileXWithScale

longitudeToTileX

longitudeToX

metersToPixelsWithScale

metersToPixels

pixelXToLongitudeWithScale

pixelXToLongitude

pixelXToTileXWithScale

pixelXToTileX

pixelYToLatitudeWithScale

pixelYToLatitude

pixelYToTileYWithScale

pixelYToTileY

project

project

project

scaleToZoomLevel

tileToPixel

tileXToLongitudeWithScale

tileXToLongitude

tileYToLatitudeWithScale

tileYToLatitude

toLatitude

toLongitude

wrapLongitude

zoomLevelToScale