Class ProjectionMath

java.lang.Object

org.locationtech.proj4j.util.ProjectionMath

public class ProjectionMath
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private static final double	C00
private static final double	C02
private static final double	C04
private static final double	C06
private static final double	C08
private static final double	C22
private static final double	C44
private static final double	C46
private static final double	C48
private static final double	C66
private static final double	C68
private static final double	C88
static final double	DTR
static final double	EPS10
static final double	FORTPI
static final double	HALFPI
private static final int	MAX_ITER
static final double	MILLION
private static final int	N_ITER
private static final double	P00
private static final double	P01
private static final double	P02
private static final double	P10
private static final double	P11
private static final double	P20
static final double	PI
static final double	QUARTERPI
static final double	RTD
static final double	SECONDS_TO_RAD
static final double	TWOPI

Constructor Summary

Constructors

Constructor	Description
ProjectionMath()

Method Summary

Modifier and Type	Method	Description
static double	acos(double v)
static double	acosd(double v)
static double	asin(double v)
static double	asind(double v)
static double	atan2(double y, double x)
static double	atan2d(double y, double x)
static double	atand(double v)
static double	authlat(double beta, double[] APA)
static double[]	authset(double es)
static double	cosd(double v)
static double	cross(double x1, double y1, double x2, double y2)
static double	degToRad(double v)
static double	distance(double dx, double dy)
static double	dmsToDeg(double d, double m, double s)
static double	dmsToRad(double d, double m, double s)
static double[]	enfn(double es)
static double	frac(double v)
static double	geocentricLatitude(double lat, double flatness)
static double	geographicLatitude(double lat, double flatness)
static double	greatCircleDistance(double lon1, double lat1, double lon2, double lat2)
static double	hypot(double x, double y)
static double	inv_mlfn(double arg, double es, double[] en)
static boolean	isIdentity(double[] transform)	Tests whether the datum parameter-based transform is the identity transform (in which case datum transformation can be short-circuited, thus avoiding some loss of numerical precision).
static double	longitudeDistance(double l1, double l2)
static double	mlfn(double phi, double sphi, double cphi, double[] en)
static double	msfn(double sinphi, double cosphi, double es)
static double	niceNumber(double x, boolean round)
static double	normalizeAngle(double angle)
static double	normalizeLatitude(double angle)
static double	normalizeLongitude(double angle)
static double	phi2(double ts, double e)
static double	qsfn(double sinphi, double e, double one_es)
static double	radToDeg(double v)
static boolean	sameSigns(double a, double b)
static boolean	sameSigns(int a, int b)
static double	sind(double v)	Degree versions of trigonometric functions
static double	sphericalAzimuth(double lat0, double lon0, double lat, double lon)
static double	sqrt(double v)
static double	takeSign(double a, double b)
static int	takeSign(int a, int b)
static double	tand(double v)
static double	trunc(double v)
static double	tsfn(double phi, double sinphi, double e)
static Complex	zpoly1(Complex z, Complex[] c)	Evaluate complex polynomial.
static Complex	zpoly1d(Complex z, Complex[] C, Complex der)	Evaluate a complex polynomial and its derivative

Methods inherited from class Object

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

Field Details

PI

public static final double PI

See Also:

• Constant Field Values

HALFPI

public static final double HALFPI

See Also:

• Constant Field Values

QUARTERPI

public static final double QUARTERPI

See Also:

• Constant Field Values

FORTPI

public static final double FORTPI

See Also:

• Constant Field Values

TWOPI

public static final double TWOPI

See Also:

• Constant Field Values

RTD

public static final double RTD

See Also:

• Constant Field Values

DTR

public static final double DTR

See Also:

• Constant Field Values

EPS10

public static final double EPS10

See Also:

• Constant Field Values

N_ITER

private static final int N_ITER

See Also:

• Constant Field Values

C00

private static final double C00

See Also:

• Constant Field Values

C02

private static final double C02

See Also:

• Constant Field Values

C04

private static final double C04

See Also:

• Constant Field Values

C06

private static final double C06

See Also:

• Constant Field Values

C08

private static final double C08

See Also:

• Constant Field Values

C22

private static final double C22

See Also:

• Constant Field Values

C44

private static final double C44

See Also:

• Constant Field Values

C46

private static final double C46

See Also:

• Constant Field Values

C48

private static final double C48

See Also:

• Constant Field Values

C66

private static final double C66

See Also:

• Constant Field Values

C68

private static final double C68

See Also:

• Constant Field Values

C88

private static final double C88

See Also:

• Constant Field Values

MAX_ITER

private static final int MAX_ITER

See Also:

• Constant Field Values

P00

private static final double P00

See Also:

• Constant Field Values

P01

private static final double P01

See Also:

• Constant Field Values

P02

private static final double P02

See Also:

• Constant Field Values

P10

private static final double P10

See Also:

• Constant Field Values

P11

private static final double P11

See Also:

• Constant Field Values

P20

private static final double P20

See Also:

• Constant Field Values

SECONDS_TO_RAD

public static final double SECONDS_TO_RAD

See Also:

• Constant Field Values

MILLION

public static final double MILLION

See Also:

• Constant Field Values

Constructor Details

ProjectionMath

public ProjectionMath()

Method Details

sind

public static double sind(double v)

Degree versions of trigonometric functions

cosd

public static double cosd(double v)

tand

public static double tand(double v)

asind

public static double asind(double v)

acosd

public static double acosd(double v)

atand

public static double atand(double v)

atan2d

public static double atan2d(double y,
 double x)

asin

public static double asin(double v)

acos

public static double acos(double v)

sqrt

public static double sqrt(double v)

distance

public static double distance(double dx,
 double dy)

hypot

public static double hypot(double x,
 double y)

atan2

public static double atan2(double y,
 double x)

trunc

public static double trunc(double v)

frac

public static double frac(double v)

degToRad

public static double degToRad(double v)

radToDeg

public static double radToDeg(double v)

dmsToRad

public static double dmsToRad(double d,
 double m,
 double s)

dmsToDeg

public static double dmsToDeg(double d,
 double m,
 double s)

normalizeLatitude

public static double normalizeLatitude(double angle)

normalizeLongitude

public static double normalizeLongitude(double angle)

normalizeAngle

public static double normalizeAngle(double angle)

greatCircleDistance

public static double greatCircleDistance(double lon1,
 double lat1,
 double lon2,
 double lat2)

sphericalAzimuth

public static double sphericalAzimuth(double lat0,
 double lon0,
 double lat,
 double lon)

sameSigns

public static boolean sameSigns(double a,
 double b)

sameSigns

public static boolean sameSigns(int a,
 int b)

takeSign

public static double takeSign(double a,
 double b)

takeSign

public static int takeSign(int a,
 int b)

cross

public static double cross(double x1,
 double y1,
 double x2,
 double y2)

longitudeDistance

public static double longitudeDistance(double l1,
 double l2)

geocentricLatitude

public static double geocentricLatitude(double lat,
 double flatness)

geographicLatitude

public static double geographicLatitude(double lat,
 double flatness)

tsfn

public static double tsfn(double phi,
 double sinphi,
 double e)

msfn

public static double msfn(double sinphi,
 double cosphi,
 double es)

phi2

public static double phi2(double ts,
 double e)

enfn

public static double[] enfn(double es)

mlfn

public static double mlfn(double phi,
 double sphi,
 double cphi,
 double[] en)

inv_mlfn

public static double inv_mlfn(double arg,
 double es,
 double[] en)

authset

public static double[] authset(double es)

authlat

public static double authlat(double beta,
 double[] APA)

qsfn

public static double qsfn(double sinphi,
 double e,
 double one_es)

niceNumber

public static double niceNumber(double x,
 boolean round)

zpoly1

public static Complex zpoly1(Complex z,
 Complex[] c)

Evaluate complex polynomial. Note coefficients are always C[1] to C[n], C[0] is always (0,0).

zpoly1d

public static Complex zpoly1d(Complex z,
 Complex[] C,
 Complex der)

Evaluate a complex polynomial and its derivative

isIdentity

public static boolean isIdentity(double[] transform)

Tests whether the datum parameter-based transform is the identity transform (in which case datum transformation can be short-circuited, thus avoiding some loss of numerical precision).

Parameters:

transform -

Returns: