Maria::WebMercator Namespace Reference

Typedefs
typedef uint64_t	IntCoord
	Integer coordinate values for quad tiles.

Functions
double	intToMeters (IntCoord i)
IntCoord	metersToInt (double m)
double	intToLatitude (IntCoord intY)
double	intToLongitude (IntCoord intX)
void	intToLatLon (IntCoord intX, IntCoord intY, double &lat, double &lon)
double	clip (double val, double min_val, double max_val)
IntCoord	latitudeToInt (double lat)
IntCoord	longitudeToInt (double lon)
void	latLonToInt (double lat, double lon, IntCoord &intX, IntCoord &intY)
void	tileBoundsInt (int level, int col, int row, IntCoord &x_min, IntCoord &y_min, IntCoord &x_max, IntCoord &y_max)
	Calculate tile boundaries in int coordinates.
void	xyToTileCoord (IntCoord x, IntCoord y, int level, int &row, int &col)
double	calcGroundResolution (double latitude, int level, unsigned int tileSize)

Variables
constexpr uint64_t	MaxIntCoord = 0x7fffffffffffffff
constexpr double	MinLatitude = -85.05112878
constexpr double	MaxLatitude = 85.05112878
constexpr double	MinLongitude = -180.0
constexpr double	MaxLongitude = 180.0
constexpr double	MinX = -20037508.34
constexpr double	MaxX = 20037508.34
constexpr double	MinY = -20037508.34
constexpr double	MaxY = 20037508.34
constexpr double	EarthRadius = 6378137.0
const char	projString [] = "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs"

Detailed Description

Conversion routines for Web (Google) Mercator, aka EPSG:3857/EPSG:900913. These methods are used to convert between internal tile coordinates (integers) and geographical latitude/longitude.

For more information, see http://en.wikipedia.org/wiki/Web_Mercator http://msdn.microsoft.com/en-us/library/bb259689.aspx