A registry for known coordinate reference system (CRS) definitions, including any user-defined CRSes. More...

#include <qgscoordinatereferencesystemregistry.h>

Inheritance diagram for QgsCoordinateReferenceSystemRegistry:

Classes
class	UserCrsDetails
	Contains details of a custom (user defined) CRS. More...

Signals
void	crsDefinitionsChanged ()
	Emitted whenever an operation has caused any of the known CRS definitions (including user-defined CRS) to change. More...

void	userCrsAdded (const QString &id)
	Emitted whenever a new user CRS definition is added. More...

void	userCrsChanged (const QString &id)
	Emitted whenever an existing user CRS definition is changed. More...

void	userCrsRemoved (long id)
	Emitted when the user CRS with matching id is removed from the database. More...

Public Member Functions
	QgsCoordinateReferenceSystemRegistry (QObject *parent=nullptr)
	Constructor for QgsCoordinateReferenceSystemRegistry, with the specified parent object. More...

	~QgsCoordinateReferenceSystemRegistry ()

long	addUserCrs (const QgsCoordinateReferenceSystem &crs, const QString &name, QgsCoordinateReferenceSystem::Format nativeFormat=QgsCoordinateReferenceSystem::FormatWkt)
	Adds a new crs definition as a custom ("USER") CRS. More...

QList< QgsCelestialBody >	celestialBodies () const
	Returns a list of all known celestial bodies. More...

QMap< QString, QgsProjOperation >	projOperations () const
	Returns a map of all valid PROJ operations. More...

bool	removeUserCrs (long id)
	Removes the existing user CRS with matching id. More...

bool	updateUserCrs (long id, const QgsCoordinateReferenceSystem &crs, const QString &name, QgsCoordinateReferenceSystem::Format nativeFormat=QgsCoordinateReferenceSystem::FormatWkt)
	Updates the definition of the existing user CRS with matching id. More...

QList< QgsCoordinateReferenceSystemRegistry::UserCrsDetails >	userCrsList () const
	Returns a list containing the details of all registered custom (user-defined) CRSes. More...

Detailed Description

A registry for known coordinate reference system (CRS) definitions, including any user-defined CRSes.

QgsCoordinateReferenceSystemRegistry is not usually directly created, but rather accessed through QgsApplication::coordinateReferenceSystemRegistry().

Since: QGIS 3.18

Definition at line 39 of file qgscoordinatereferencesystemregistry.h.

Constructor & Destructor Documentation

◆ QgsCoordinateReferenceSystemRegistry()

QgsCoordinateReferenceSystemRegistry::QgsCoordinateReferenceSystemRegistry ( QObject * parent = nullptr )

explicit

Constructor for QgsCoordinateReferenceSystemRegistry, with the specified parent object.

Definition at line 35 of file qgscoordinatereferencesystemregistry.cpp.

◆ ~QgsCoordinateReferenceSystemRegistry()

QgsCoordinateReferenceSystemRegistry::~QgsCoordinateReferenceSystemRegistry ( )

default

Member Function Documentation

◆ addUserCrs()

long QgsCoordinateReferenceSystemRegistry::addUserCrs	(	const QgsCoordinateReferenceSystem &	crs,
		const QString &	name,
		QgsCoordinateReferenceSystem::Format	nativeFormat = `QgsCoordinateReferenceSystem::FormatWkt`
	)

Adds a new crs definition as a custom ("USER") CRS.

Returns the new CRS srsid(), or -1 if the CRS could not be saved.

The nativeFormat argument specifies the format to use when saving the CRS definition. FormatWkt is recommended as it is a lossless format.

Warning: Not all CRS definitions can be represented as a Proj string, so take care when using the FormatProj option.

See also: updateUserCrs(); userCrsAdded()

Definition at line 82 of file qgscoordinatereferencesystemregistry.cpp.

◆ celestialBodies()

QList< QgsCelestialBody > QgsCoordinateReferenceSystemRegistry::celestialBodies ( ) const

Returns a list of all known celestial bodies.

Warning: This method requires PROJ 8.1 or later

Exceptions

QgsNotSupportedException on QGIS builds based on PROJ 8.0 or earlier.

Since: QGIS 3.20

Definition at line 377 of file qgscoordinatereferencesystemregistry.cpp.

◆ crsDefinitionsChanged

void QgsCoordinateReferenceSystemRegistry::crsDefinitionsChanged ( )

signal

Emitted whenever an operation has caused any of the known CRS definitions (including user-defined CRS) to change.

◆ projOperations()

QMap< QString, QgsProjOperation > QgsCoordinateReferenceSystemRegistry::projOperations ( ) const

Returns a map of all valid PROJ operations.

The map keys correspond to PROJ operation IDs.

Since: QGIS 3.20

Definition at line 349 of file qgscoordinatereferencesystemregistry.cpp.

◆ removeUserCrs()

bool QgsCoordinateReferenceSystemRegistry::removeUserCrs ( long id )

Removes the existing user CRS with matching id.

Returns false if the CRS could not be removed.

See also: userCrsRemoved()

Definition at line 244 of file qgscoordinatereferencesystemregistry.cpp.

◆ updateUserCrs()

bool QgsCoordinateReferenceSystemRegistry::updateUserCrs	(	long	id,
		const QgsCoordinateReferenceSystem &	crs,
		const QString &	name,
		QgsCoordinateReferenceSystem::Format	nativeFormat = `QgsCoordinateReferenceSystem::FormatWkt`
	)

Updates the definition of the existing user CRS with matching id.

The crs argument specifies a CRS with the desired new definition.

Returns false if the new CRS definition could not be saved.

The nativeFormat argument specifies the format to use when saving the CRS definition. FormatWkt is recommended as it is a lossless format.

Warning: Not all CRS definitions can be represented as a Proj string, so take care when using the FormatProj option.

See also: addUserCrs(); userCrsChanged()

Definition at line 174 of file qgscoordinatereferencesystemregistry.cpp.

◆ userCrsAdded

void QgsCoordinateReferenceSystemRegistry::userCrsAdded ( const QString & id )

signal

Emitted whenever a new user CRS definition is added.

The id argument specifies the ID of the user CRS which has been changed.

See also: userCrsChanged(); crsDefinitionsChanged()

◆ userCrsChanged

void QgsCoordinateReferenceSystemRegistry::userCrsChanged ( const QString & id )

signal

Emitted whenever an existing user CRS definition is changed.

The id argument specifies the ID of the user CRS which has been changed.

Objects which store QgsCoordinateReferenceSystem members should connect to this signal and update any stored CRS definitions to ensure that they always use the current definition of any user defined CRSes.

See also: crsDefinitionsChanged(); userCrsAdded()

◆ userCrsList()

QList< QgsCoordinateReferenceSystemRegistry::UserCrsDetails > QgsCoordinateReferenceSystemRegistry::userCrsList ( ) const

Returns a list containing the details of all registered custom (user-defined) CRSes.

Definition at line 43 of file qgscoordinatereferencesystemregistry.cpp.

◆ userCrsRemoved

void QgsCoordinateReferenceSystemRegistry::userCrsRemoved ( long id )

signal

Emitted when the user CRS with matching id is removed from the database.

See also: removeUserCrs()

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

/build/qgis-3.20.0+99unstable/src/core/proj/qgscoordinatereferencesystemregistry.h
/build/qgis-3.20.0+99unstable/src/core/proj/qgscoordinatereferencesystemregistry.cpp

Classes

Signals

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ QgsCoordinateReferenceSystemRegistry()

◆ ~QgsCoordinateReferenceSystemRegistry()

Member Function Documentation

◆ addUserCrs()

◆ celestialBodies()

◆ crsDefinitionsChanged

◆ projOperations()

◆ removeUserCrs()

◆ updateUserCrs()

◆ userCrsAdded

◆ userCrsChanged

◆ userCrsList()

◆ userCrsRemoved