transform.cpp File Reference

#include <boost/math/constants/constants.hpp>
#include <cmath>
#include "settings.hpp"

Go to the source code of this file.

Macros
#define	NORM   (FACTOR * RADIUS/2.0)
	This file is part of alaCarte. More...
#define	RADIUS   6378137.0
#define	FACTOR   100.0

Functions
void	tileToMercator (int tx, int ty, int zoom, coord_t &x, coord_t &y)
	converts tile coordinates to north-west corner of the tile in the Mercator projection. More...
void	mercatorToTile (coord_t x, coord_t y, int zoom, int &tx, int &ty)
	converts mercator coordinates to the coords of the tile they are contained in. More...
void	projectMercator (const FloatPoint &p, coord_t &x, coord_t &y)
	converts cooridinates in lat/lon (WGS84) to spherical Mercator (EPSG:3857). More...
void	inverseMercator (const FixedPoint &p, double &lat, double &lon)
	converts cooridinates in lat/lon (WGS84) to spherical Mercator (EPSG:3857). More...
uint64_t	spreadBits32 (uint32_t y)
uint64_t	interleave64 (uint32_t x, uint32_t y)
uint64_t	xy2hilbert (FixedPoint p)

Macro Definition Documentation

#define FACTOR   100.0

Definition at line 41 of file transform.cpp.

#define NORM   (FACTOR * RADIUS/2.0)

This file is part of alaCarte.

alaCarte is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

alaCarte is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License along with alaCarte. If not, see http://www.gnu.org/licenses/.

Copyright alaCarte 2012-2013 Simon Dreher, Florian Jacob, Tobias Kahlert, Patrick Niklaus, Bernhard Scheirle, Lisa Winter Maintainer: Patrick Niklaus

Definition at line 37 of file transform.cpp.

#define RADIUS   6378137.0

Definition at line 39 of file transform.cpp.

Function Documentation

uint64_t interleave64	(	uint32_t	x,
		uint32_t	y
	)

Definition at line 132 of file transform.cpp.

void inverseMercator	(	const FixedPoint &	p,
		double &	lat,
		double &	lon
	)

converts cooridinates in lat/lon (WGS84) to spherical Mercator (EPSG:3857).

Parameters

p	point in Mercator coordinates.
lat	reference to store lat coords.
lon	reference to store lon coords.

Definition at line 102 of file transform.cpp.

void mercatorToTile	(	coord_t	x,
		coord_t	y,
		int	zoom,
		int &	tx,
		int &	ty
	)

converts mercator coordinates to the coords of the tile they are contained in.

Parameters

x	coordinate in the Mercator projection.
y	coordinate in the Mercator projection.
zoom	zoomlevel of the tile
tx	reference to store the x coordinate of the tile
ty	reference to store the y coordinate of the tile

Definition at line 73 of file transform.cpp.

void projectMercator	(	const FloatPoint &	p,
		coord_t &	x,
		coord_t &	y
	)

converts cooridinates in lat/lon (WGS84) to spherical Mercator (EPSG:3857).

Parameters

p	point in lat/lon coordinates.
x	reference to store x coords.
y	reference to store y coords.

Definition at line 87 of file transform.cpp.

uint64_t spreadBits32

(

uint32_t

y

)

Definition at line 108 of file transform.cpp.

void tileToMercator	(	int	tx,
		int	ty,
		int	zoom,
		coord_t &	x,
		coord_t &	y
	)

converts tile coordinates to north-west corner of the tile in the Mercator projection.

Parameters

tx	x coordinate of the tile
ty	y coordinate of the tile
zoom	zoomlevel of the tile
x	reference to store x coords.
y	reference to store y coords.

Definition at line 52 of file transform.cpp.

uint64_t xy2hilbert

(

FixedPoint

p

)

Definition at line 137 of file transform.cpp.