Marble::GeoDataCoordinates

#include <GeoDataCoordinates.h>

Public Types
enum	BearingType { InitialBearing, FinalBearing }

enum	Notation { Decimal, DMS, DM, UTM, Astro }

using	PtrVector = QVector< GeoDataCoordinates * >

enum	Unit { Radian, Degree }

using	Vector = QVector< GeoDataCoordinates >

Public Member Functions
	GeoDataCoordinates ()

	GeoDataCoordinates (const GeoDataCoordinates &other)

	GeoDataCoordinates (qreal lon, qreal lat, qreal alt=0, GeoDataCoordinates::Unit unit=GeoDataCoordinates::Radian, int detail=0)

qreal	altitude () const

qreal	bearing (const GeoDataCoordinates &other, Unit unit=Radian, BearingType type=InitialBearing) const

quint8	detail () const

void	geoCoordinates (qreal &lon, qreal &lat) const

void	geoCoordinates (qreal &lon, qreal &lat, GeoDataCoordinates::Unit unit) const

void	geoCoordinates (qreal &lon, qreal &lat, qreal &alt) const

void	geoCoordinates (qreal &lon, qreal &lat, qreal &alt, GeoDataCoordinates::Unit unit) const

GeoDataCoordinates	interpolate (const GeoDataCoordinates &before, const GeoDataCoordinates &target, const GeoDataCoordinates &after, double t) const

GeoDataCoordinates	interpolate (const GeoDataCoordinates &target, double t) const

bool	isPole (Pole=AnyPole) const

bool	isValid () const

qreal	latitude () const

qreal	latitude (GeoDataCoordinates::Unit unit) const

QString	latToString () const

qreal	longitude () const

qreal	longitude (GeoDataCoordinates::Unit unit) const

QString	lonToString () const

GeoDataCoordinates	moveByBearing (qreal bearing, qreal distance) const

GeoDataCoordinates	nlerp (const GeoDataCoordinates &target, double t) const

bool	operator!= (const GeoDataCoordinates &other) const

GeoDataCoordinates &	operator= (const GeoDataCoordinates &other)

bool	operator== (const GeoDataCoordinates &other) const

void	pack (QDataStream &stream) const

const Quaternion &	quaternion () const

GeoDataCoordinates	rotateAround (const GeoDataCoordinates &axis, qreal angle, Unit unit=Radian) const

GeoDataCoordinates	rotateAround (const Quaternion &rotAxis) const

void	set (qreal lon, qreal lat, qreal alt=0, GeoDataCoordinates::Unit unit=GeoDataCoordinates::Radian)

void	setAltitude (const qreal altitude)

void	setDetail (quint8 detail)

void	setLatitude (qreal lat, GeoDataCoordinates::Unit unit=GeoDataCoordinates::Radian)

void	setLongitude (qreal lon, GeoDataCoordinates::Unit unit=GeoDataCoordinates::Radian)

qreal	sphericalDistanceTo (const GeoDataCoordinates &other) const

QString	toString () const

QString	toString (GeoDataCoordinates::Notation notation, int precision=-1) const

void	unpack (QDataStream &stream)

qreal	utmEasting () const

QString	utmLatitudeBand () const

qreal	utmNorthing () const

int	utmZone () const

Static Public Member Functions
static GeoDataCoordinates::Notation	defaultNotation ()

static GeoDataCoordinates	fromString (const QString &string, bool &successful)

static QString	latToString (qreal lat, GeoDataCoordinates::Notation notation, GeoDataCoordinates::Unit unit=Radian, int precision=-1, char format='f')

static QString	lonToString (qreal lon, GeoDataCoordinates::Notation notation, GeoDataCoordinates::Unit unit=Radian, int precision=-1, char format='f')

static qreal	normalizeLat (qreal lat, GeoDataCoordinates::Unit=GeoDataCoordinates::Radian)

static qreal	normalizeLon (qreal lon, GeoDataCoordinates::Unit=GeoDataCoordinates::Radian)

static void	normalizeLonLat (qreal &lon, qreal &lat, GeoDataCoordinates::Unit=GeoDataCoordinates::Radian)

static void	setDefaultNotation (GeoDataCoordinates::Notation notation)

Detailed Description

A 3d point representation.

GeoDataCoordinates is the simple representation of a single three dimensional point. It can be used all through out marble as the data type for three dimensional objects. it comprises of a Quaternion for speed issues. This class was introduced to reflect the difference between a simple 3d point and the GeoDataGeometry object containing such a point. The latter is a GeoDataPoint and is simply derived from GeoDataCoordinates.

See also: GeoDataPoint

Definition at line 40 of file GeoDataCoordinates.h.

Member Enumeration Documentation

◆ BearingType

enum Marble::GeoDataCoordinates::BearingType

The BearingType enum specifies where to measure the bearing along great circle arcs.

When traveling along a great circle arc defined by the two points A and B, the bearing varies along the arc. The "InitialBearing" bearing corresponds to the bearing value at A, the "FinalBearing" bearing to that at B.

Definition at line 84 of file GeoDataCoordinates.h.

◆ Notation

enum Marble::GeoDataCoordinates::Notation

enum used to specify the notation / numerical system

For degrees there exist two notations: "Decimal" (base-10) and the "Sexagesimal DMS" (base-60) which is traditionally used in cartography. Decimal notation uses floating point numbers to specify parts of a degree. The Sexagesimal DMS notation uses integer based Degrees-(Arc)Minutes-(Arc)Seconds to describe parts of a degree.

Enumerator
Decimal	"Decimal" notation (base-10)
DMS	"Sexagesimal DMS" notation (base-60)
DM	"Sexagesimal DM" notation (base-60)
Astro	< "RA and DEC" notation (used for astronomical sky coordinates)

Definition at line 67 of file GeoDataCoordinates.h.

◆ Unit

enum Marble::GeoDataCoordinates::Unit

enum used constructor to specify the units used

Internally we always use radian for mathematical convenience. However the Marble's interfaces to the outside should default to degrees.

Definition at line 52 of file GeoDataCoordinates.h.

Constructor & Destructor Documentation

◆ GeoDataCoordinates() [1/2]

Marble::GeoDataCoordinates::GeoDataCoordinates ( )

constructs an invalid instance

Constructs an invalid instance such that calling isValid() on it will return

false

Definition at line 54 of file GeoDataCoordinates.cpp.

◆ GeoDataCoordinates() [2/2]

Marble::GeoDataCoordinates::GeoDataCoordinates	(	qreal	lon,
		qreal	lat,
		qreal	alt = `0`,
		GeoDataCoordinates::Unit	unit = `GeoDataCoordinates::Radian`,
		int	detail = `0`
	)

create a geocoordinate from longitude and latitude

Parameters

lon	longitude
lat	latitude
alt	altitude in meters (default: 0)
unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)
detail	detail (default: 0)

Definition at line 36 of file GeoDataCoordinates.cpp.

Member Function Documentation

◆ altitude()

qreal Marble::GeoDataCoordinates::altitude ( ) const

return the altitude of the Point in meters

Definition at line 718 of file GeoDataCoordinates.cpp.

◆ bearing()

qreal Marble::GeoDataCoordinates::bearing	(	const GeoDataCoordinates &	other,
		Unit	unit = `Radian`,
		BearingType	type = `InitialBearing`
	)		const

Returns the bearing (true bearing, the angle between the line defined by this point and the other and the prime meridian)

Parameters

other	The second point that, together with this point, defines a line
unit	Unit of the result
type	Type of the bearing

Returns: The true bearing in the requested unit, not range normalized, in clockwise direction, with the value 0 corresponding to north

Definition at line 768 of file GeoDataCoordinates.cpp.

◆ defaultNotation()

GeoDataCoordinates::Notation Marble::GeoDataCoordinates::defaultNotation ( )

static

return Notation of string representation

Definition at line 233 of file GeoDataCoordinates.cpp.

◆ detail()

quint8 Marble::GeoDataCoordinates::detail ( ) const

return the detail flag detail range: 0 for most important points, 5 for least important

Definition at line 739 of file GeoDataCoordinates.cpp.

◆ fromString()

GeoDataCoordinates Marble::GeoDataCoordinates::fromString	(	const QString &	string,
		bool &	successful
	)

static

try to parse the string into a coordinate pair

Parameters

string	the string
successful	becomes true if the conversion succeeds

Returns: the geodatacoordinates

Definition at line 378 of file GeoDataCoordinates.cpp.

◆ geoCoordinates() [1/2]

void Marble::GeoDataCoordinates::geoCoordinates	(	qreal &	lon,
		qreal &	lat,
		GeoDataCoordinates::Unit	unit
	)		const

use this function to get the longitude and latitude with one call - use the unit parameter to switch between Radian and DMS

Parameters

lon	longitude
lat	latitude
unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)

Definition at line 161 of file GeoDataCoordinates.cpp.

◆ geoCoordinates() [2/2]

void Marble::GeoDataCoordinates::geoCoordinates	(	qreal &	lon,
		qreal &	lat,
		qreal &	alt,
		GeoDataCoordinates::Unit	unit
	)		const

use this function to get the longitude, latitude and altitude with one call - use the unit parameter to switch between Radian and DMS

Parameters

lon	longitude
lat	latitude
alt	altitude in meters
unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)

Definition at line 184 of file GeoDataCoordinates.cpp.

◆ interpolate() [1/2]

GeoDataCoordinates Marble::GeoDataCoordinates::interpolate	(	const GeoDataCoordinates &	before,
		const GeoDataCoordinates &	target,
		const GeoDataCoordinates &	after,
		double	t
	)		const

squad (spherical and quadrangle) interpolation between b and c

Parameters

before	First base point
target	Third base point (second interpolation point)
after	Fourth base point
t	Offset between b (t<=0) and c (t>=1)

Definition at line 822 of file GeoDataCoordinates.cpp.

◆ interpolate() [2/2]

GeoDataCoordinates Marble::GeoDataCoordinates::interpolate	(	const GeoDataCoordinates &	target,
		double	t
	)		const

slerp (spherical linear) interpolation between this coordinate and the given target coordinate

Parameters

target	Destination coordinate
t	Fraction 0..1 to weight between this and target

Returns: Interpolated coordinate between this (t<=0.0) and target (t>=1.0)

Definition at line 799 of file GeoDataCoordinates.cpp.

◆ isPole()

bool Marble::GeoDataCoordinates::isPole ( Pole pole = AnyPole ) const

return whether our coordinates represent a pole This method can be used to check whether the coordinate equals one of the poles.

Definition at line 837 of file GeoDataCoordinates.cpp.

◆ isValid()

bool Marble::GeoDataCoordinates::isValid ( ) const

Returns.

true

if the coordinate is valid,

false

otherwise.

Returns: whether the coordinate is valid

A coordinate is valid, if at least one component has been set and the last assignment was not an invalid GeoDataCoordinates object.

Definition at line 76 of file GeoDataCoordinates.cpp.

◆ latitude()

qreal Marble::GeoDataCoordinates::latitude ( GeoDataCoordinates::Unit unit ) const

retrieves the latitude of the GeoDataCoordinates object use the unit parameter to switch between Radian and DMS

Parameters

unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)

Returns: latitude

Definition at line 215 of file GeoDataCoordinates.cpp.

◆ latToString() [1/2]

QString Marble::GeoDataCoordinates::latToString ( ) const

return a string representation of latitude of the coordinate convenience function that uses the default notation

Definition at line 697 of file GeoDataCoordinates.cpp.

◆ latToString() [2/2]

QString Marble::GeoDataCoordinates::latToString	(	qreal	lat,
		GeoDataCoordinates::Notation	notation,
		GeoDataCoordinates::Unit	unit = `Radian`,
		int	precision = `-1`,
		char	format = `'f'`
	)

static

Fixme:: : UTM needs lon + lat to know latitude band and northing By now, this code returns the band+northing of the point (meridian, lat), but this can differ a lot at different locations See bug 347536 https://bugs.kde.org/show_bug.cgi?id=347536

Definition at line 586 of file GeoDataCoordinates.cpp.

◆ longitude()

qreal Marble::GeoDataCoordinates::longitude ( GeoDataCoordinates::Unit unit ) const

retrieves the longitude of the GeoDataCoordinates object use the unit parameter to switch between Radian and DMS

Parameters

unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)

Returns: longitude

Definition at line 198 of file GeoDataCoordinates.cpp.

◆ lonToString() [1/2]

QString Marble::GeoDataCoordinates::lonToString ( ) const

return a string representation of longitude of the coordinate convenience function that uses the default notation

Definition at line 581 of file GeoDataCoordinates.cpp.

◆ lonToString() [2/2]

QString Marble::GeoDataCoordinates::lonToString	(	qreal	lon,
		GeoDataCoordinates::Notation	notation,
		GeoDataCoordinates::Unit	unit = `Radian`,
		int	precision = `-1`,
		char	format = `'f'`
	)

static

Fixme:: : UTM needs lon + lat to know zone number and easting By now, this code returns the zone+easting of the point (lon, equator), but this can differ a lot at different locations See bug 347536 https://bugs.kde.org/show_bug.cgi?id=347536

Definition at line 421 of file GeoDataCoordinates.cpp.

◆ moveByBearing()

GeoDataCoordinates Marble::GeoDataCoordinates::moveByBearing	(	qreal	bearing,
		qreal	distance
	)		const

Returns the coordinates of the resulting point after moving this point according to the distance and bearing parameters.

Parameters

bearing	the same as above
distance	the distance on a unit sphere

Definition at line 781 of file GeoDataCoordinates.cpp.

◆ nlerp()

GeoDataCoordinates Marble::GeoDataCoordinates::nlerp	(	const GeoDataCoordinates &	target,
		double	t
	)		const

nlerp (normalized linear interpolation) between this coordinates and the given target coordinates

Parameters

target	Destination coordinates
t	Fraction 0..1 to weight between this and target

Returns: Interpolated coordinate between this (t<=0.0) and target (t>=1.0)

Definition at line 809 of file GeoDataCoordinates.cpp.

◆ normalizeLat()

qreal Marble::GeoDataCoordinates::normalizeLat	(	qreal	lat,
		GeoDataCoordinates::Unit	unit = `GeoDataCoordinates::Radian`
	)

static

normalize latitude to always be in -M_PI / 2.

<= lat <= +M_PI / 2 (Radian).

Parameters

lat	latitude
unit	unit of the result

Definition at line 268 of file GeoDataCoordinates.cpp.

◆ normalizeLon()

qreal Marble::GeoDataCoordinates::normalizeLon	(	qreal	lon,
		GeoDataCoordinates::Unit	unit = `GeoDataCoordinates::Radian`
	)

static

normalize the longitude to always be -M_PI <= lon <= +M_PI (Radian).

Parameters

lon	longitude
unit	unit of the result

Definition at line 245 of file GeoDataCoordinates.cpp.

◆ normalizeLonLat()

void Marble::GeoDataCoordinates::normalizeLonLat	(	qreal &	lon,
		qreal &	lat,
		GeoDataCoordinates::Unit	unit = `GeoDataCoordinates::Radian`
	)

static

normalize both longitude and latitude at the same time This method normalizes both latitude and longitude, so that the latitude and the longitude stay within the "usual" range.

NOTE: If the latitude exceeds M_PI/2 (+90.0 deg) or -M_PI/2 (-90.0 deg) then this will be interpreted as a pole traversion where the point will
end up on the opposite side of the globe. Therefore the longitude will change by M_PI (180 deg). If you don't want this behaviour use both normalizeLat() and normalizeLon() instead.

Parameters

lon	the longitude value
lat	the latitude value
unit	unit of the result

Definition at line 314 of file GeoDataCoordinates.cpp.

◆ pack()

void Marble::GeoDataCoordinates::pack ( QDataStream & stream ) const

Serialize the contents of the feature to stream.

Definition at line 909 of file GeoDataCoordinates.cpp.

◆ quaternion()

const Quaternion & Marble::GeoDataCoordinates::quaternion ( ) const

return a Quaternion with the used coordinates

Definition at line 791 of file GeoDataCoordinates.cpp.

◆ rotateAround()

GeoDataCoordinates Marble::GeoDataCoordinates::rotateAround	(	const GeoDataCoordinates &	axis,
		qreal	angle,
		Unit	unit = `Radian`
	)		const

Rotates one coordinate around another.

Parameters

axis	The coordinate that serves as a rotation axis
angle	Rotation angle
unit	Unit of the result

Returns: The coordinate rotated in anticlockwise direction

Definition at line 750 of file GeoDataCoordinates.cpp.

◆ set()

void Marble::GeoDataCoordinates::set	(	qreal	lon,
		qreal	lat,
		qreal	alt = `0`,
		GeoDataCoordinates::Unit	unit = `GeoDataCoordinates::Radian`
	)

(re)set the coordinates in a GeoDataCoordinates object

Parameters

lon	longitude
lat	latitude
alt	altitude in meters (default: 0)
unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)

Definition at line 110 of file GeoDataCoordinates.cpp.

◆ setAltitude()

void Marble::GeoDataCoordinates::setAltitude ( const qreal altitude )

set the altitude of the Point in meters

Parameters

altitude altitude

Definition at line 712 of file GeoDataCoordinates.cpp.

◆ setDefaultNotation()

void Marble::GeoDataCoordinates::setDefaultNotation ( GeoDataCoordinates::Notation notation )

static

set the Notation of the string representation

Parameters

notation Notation

Definition at line 239 of file GeoDataCoordinates.cpp.

◆ setDetail()

void Marble::GeoDataCoordinates::setDetail ( quint8 detail )

set the detail flag

Parameters

detail detail

Definition at line 744 of file GeoDataCoordinates.cpp.

◆ setLatitude()

void Marble::GeoDataCoordinates::setLatitude	(	qreal	lat,
		GeoDataCoordinates::Unit	unit = `GeoDataCoordinates::Radian`
	)

set the longitude in a GeoDataCoordinates object

Parameters

lat	longitude
unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)

Definition at line 148 of file GeoDataCoordinates.cpp.

◆ setLongitude()

void Marble::GeoDataCoordinates::setLongitude	(	qreal	lon,
		GeoDataCoordinates::Unit	unit = `GeoDataCoordinates::Radian`
	)

set the longitude in a GeoDataCoordinates object

Parameters

lon	longitude
unit	units that lon and lat get measured in (default for Radian: north pole at pi/2, southpole at -pi/2)

Definition at line 130 of file GeoDataCoordinates.cpp.

◆ sphericalDistanceTo()

qreal Marble::GeoDataCoordinates::sphericalDistanceTo ( const GeoDataCoordinates & other ) const

This method calculates the shortest distance between two points on a sphere.

See: https://en.wikipedia.org/wiki/Great-circle_distance

Definition at line 893 of file GeoDataCoordinates.cpp.

◆ toString() [1/2]

QString Marble::GeoDataCoordinates::toString ( ) const

return a string representation of the coordinate this is a convenience function which uses the default notation

Definition at line 390 of file GeoDataCoordinates.cpp.

◆ toString() [2/2]

QString Marble::GeoDataCoordinates::toString	(	GeoDataCoordinates::Notation	notation,
		int	precision = `-1`
	)		const

return a string with the notation given by notation

Parameters

notation	set a notation different from the default one
precision	set the number of digits below degrees. The precision depends on the current notation: For Decimal representation the precision is the number of digits after the decimal point. In DMS a precision of 1 or 2 shows the arc minutes; a precision of 3 or 4 will show arc seconds. A precision beyond that will increase the number of digits after the arc second decimal point.

Definition at line 395 of file GeoDataCoordinates.cpp.

◆ unpack()

void Marble::GeoDataCoordinates::unpack ( QDataStream & stream )

Unserialize the contents of the feature from stream.

Definition at line 916 of file GeoDataCoordinates.cpp.

◆ utmEasting()

qreal Marble::GeoDataCoordinates::utmEasting ( ) const

retrieves the UTM easting of the GeoDataCoordinates object, in meters.

Returns: UTM easting

Definition at line 727 of file GeoDataCoordinates.cpp.

◆ utmLatitudeBand()

QString Marble::GeoDataCoordinates::utmLatitudeBand ( ) const

retrieves the UTM latitude band of the GeoDataCoordinates object

Returns: UTM latitude band

Definition at line 731 of file GeoDataCoordinates.cpp.

◆ utmNorthing()

qreal Marble::GeoDataCoordinates::utmNorthing ( ) const

retrieves the UTM northing of the GeoDataCoordinates object, in meters

Returns: UTM northing

Definition at line 735 of file GeoDataCoordinates.cpp.

◆ utmZone()

int Marble::GeoDataCoordinates::utmZone ( ) const

retrieves the UTM zone of the GeoDataCoordinates object.

If the point is located on one of the poles (latitude < 80S or latitude > 84N) there is no UTM zone associated; in this case, 0 is returned.

Returns: UTM zone.

Definition at line 723 of file GeoDataCoordinates.cpp.

The documentation for this class was generated from the following files:

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About Marble

Marble::GeoDataCoordinates

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ BearingType

◆ Notation

◆ Unit

Constructor & Destructor Documentation

◆ GeoDataCoordinates() [1/2]

◆ GeoDataCoordinates() [2/2]

Member Function Documentation

◆ altitude()

◆ bearing()

◆ defaultNotation()

◆ detail()

◆ fromString()

◆ geoCoordinates() [1/2]

◆ geoCoordinates() [2/2]

◆ interpolate() [1/2]

◆ interpolate() [2/2]

◆ isPole()

◆ isValid()

◆ latitude()

◆ latToString() [1/2]

◆ latToString() [2/2]

◆ longitude()

◆ lonToString() [1/2]

◆ lonToString() [2/2]

◆ moveByBearing()

◆ nlerp()

◆ normalizeLat()

◆ normalizeLon()

◆ normalizeLonLat()

◆ pack()

◆ quaternion()

◆ rotateAround()

◆ set()

◆ setAltitude()

◆ setDefaultNotation()

◆ setDetail()

◆ setLatitude()

◆ setLongitude()

◆ sphericalDistanceTo()

◆ toString() [1/2]

◆ toString() [2/2]

◆ unpack()

◆ utmEasting()

◆ utmLatitudeBand()

◆ utmNorthing()

◆ utmZone()