mercator.h File Reference

#include <cmath>

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Functions
double	getTileWH (double const latitude, int const zoom)
int	zoomToMaxTiles (int zoom)
float	zoomToResolution (double lat, int zoom)

Variables
static constexpr int	MAX_BLOCKS = 8
	Max number of adjacent blocks to support. More...
static constexpr int	MAX_ZOOM = 22
	Max zoom level to support. More...

Function Documentation

getTileWH()

double getTileWH ( double const  latitude, int const  zoom  )

inline

Calculate the tile width/height in meter

Definition at line 50 of file mercator.h.

zoomToMaxTiles()

int zoomToMaxTiles ( int  zoom )

inline

Maximum number of tiles for the zoom level in one direction

Definition at line 42 of file mercator.h.

zoomToResolution()

float zoomToResolution ( double  lat, int  zoom  )

inline

Convert latitude and zoom level to ground resolution. Resolution is how many meters per pixel are covered by a tile.

See also

https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames#Resolution_and_Scale

Definition at line 31 of file mercator.h.

Variable Documentation

MAX_BLOCKS

constexpr int MAX_BLOCKS = 8

static

Max number of adjacent blocks to support.

Definition at line 20 of file mercator.h.

MAX_ZOOM

constexpr int MAX_ZOOM = 22

static

Max zoom level to support.

Definition at line 23 of file mercator.h.