IlvUnknownProjection Class Reference

This class is used to represent an Unknown projection. More...

#include <ilviews/maps/projection/unknownp.h>

Inheritance diagram for IlvUnknownProjection:

Public Member Functions
	IlvUnknownProjection ()
	Initializes an instance of the IlvUnknownProjection class.
virtual IlvProjection *	copy () const
	Returns a copy of the projection. It must be overridden in each subclass. More...
virtual IlvProjectionClassInfo *	getClassInfo () const
	Returns the class information for the projection. More...
Public Member Functions inherited from IlvProjection
IlvMapsError	forward (const IlvCoordinate &llIn, IlvCoordinate &xyOut) const
	Converts a latitude and a longitude to Cartesian coordinates (x,y). More...
IlvMapsError	forward (IlvCoordinate &x) const
	This member function converts a latitude and a longitude to Cartesian coordinates. More...
IlDouble	getCentralMeridian () const
	Returns the central meridian of the projection. More...
IlDouble	getCentralParallel () const
	Returns the central parallel of the projection. More...
const IlvHorizontalDatum *	getDatum (void) const
	Returns the horizontal datum used for the projection. More...
const IlvEllipsoid *	getEllipsoid (void) const
	Returns the ellipsoid used for the projection. More...
IlvMapsError	getError () const
	Returns the status of the projection. If the projection is valid, the function returns IlvMapsError::NoError(), otherwise, it returns an error code. See the IlvMaps class to know how to interpret the error codes. More...
IlDouble	getFalseEasting () const
	Returns the false easting of the projection. More...
IlDouble	getFalseNorthing () const
	Returns the false northing of the projection. More...
IlvProjectionInterface *	getInterface ()
	Returns the interface of the projection. More...
IlvCoordinate	getLLCenter (void) const
	Returns the central meridian and the central parallel associated with the projection (0-0 by default). More...
IlvProjectionGeometricProperty	getProperty () const
	Returns the geometric property of the projection. More...
const IlvUnitConverter *	getUnitConverter () const
	Returns the unit converter. More...
IlvCoordinate	getXYOffset (void) const
	Returns the false easting and the false northing of the projection. More...
IlvMapsError	inverse (const IlvCoordinate &xyIn, IlvCoordinate &llOut) const
	Converts the specified coordinate to a latitude and a longitude. More...
IlvMapsError	inverse (IlvCoordinate &x) const
	Converts the IlvCoordinate representing Cartesian coordinates to a latitude and a longitude. More...
IlBoolean	isBad () const
	Checks for an inconsistent state of the projection. More...
IlBoolean	isEllipsoidEnabled () const
	Returns IlTrue if non spherical ellipsoids can be used for the projection. More...
IlBoolean	isGeocentric () const
	Checks if the projection uses geocentric latitudes. More...
IlBoolean	isInverseEnabled () const
	Returns IlTrue if the inverse function is supported by the projection. More...
IlBoolean	isShared () const
	Returns IlTrue if the projection is shared. More...
IlBoolean	isUsingLongitudeReduction () const
	Returns IlTrue if the projection uses range reduction for longitudes. More...
void	lock ()
	Locks the projection.
virtual IL_STDPREF ostream &	printPROJ4Descriptor (IL_STDPREF ostream &, IlvMapsError *status=0) const
	This virtual member function converts the projection to a string in the PROJ4 format. More...
void	save (IlvOutputFile &outputFile) const
	Saves an instance of a subclass of IlvProjection to the specified output file. More...
void	setCentralMeridian (IlDouble lon)
	Sets the central meridian of the projection. More...
void	setCentralParallel (IlDouble lat)
	Sets the central parallel of the projection. More...
virtual IlvMapsError	setDatum (const IlvHorizontalDatum *datum)
	Sets the datum used for the projection. More...
virtual IlvMapsError	setEllipsoid (const IlvEllipsoid &ellipsoid)
	Sets the ellipsoid used for the projection. More...
void	setFalseEasting (IlDouble falseEasting)
	Sets the false easting of the projection. More...
void	setFalseNorthing (IlDouble falseNorthing)
	Sets the false northing of the projection. More...
void	setGeocentric (IlBoolean geoc)
	Specifies whether the projection uses geocentric or geodetic latitudes. More...
virtual void	setLLCenter (IlDouble lon, IlDouble lat)
	Specifies the central meridian and the central parallel (in radian) associated with the projection. More...
void	setShared ()
	Specifies that the projection will be shared. More...
void	setUnitConverter (const IlvUnitConverter &converter)
	Sets the unit converter of the projection. The default unit is meters. More...
void	setUsingLongitudeReduction (IlBoolean use)
	Specifies whether the projection uses longitude reduction. More...
void	setXYOffset (IlDouble x0, IlDouble y0)
	Specifies the false easting and the false northing. More...
void	unLock ()
	Unlocks the object. More...
virtual void	write (IlvOutputFile &outputFile) const
	Saves the parameters of a projection to the specified output file. More...

Protected Member Functions
virtual IlvMapsError	eForward (IlvCoordinate &ll) const
	Must be redefined in subclasses to implement the projection for a non spherical ellipsoid. More...
virtual IlvMapsError	eInverse (IlvCoordinate &xy) const
	Implements the inverse projection for a non spherical ellipsoid. More...
virtual IlvMapsError	sForward (IlvCoordinate &ll) const
	Must be redefined in subclasses to implement the projection for a sphere. More...
virtual IlvMapsError	sInverse (IlvCoordinate &xy) const
	Must be redefined in subclasses to implement the inverse projection for a sphere. More...
Protected Member Functions inherited from IlvProjection
	IlvProjection (IlBoolean ellipsoidEnabled, IlBoolean inverseEnabled, IlvProjectionGeometricProperty property)
	This constructor initializes a new instance of the class. More...
void	addError (IlvMapsError error)
	Used by the constructors of subclasses if an error occurs during an object initialization. More...
void	setError (IlvMapsError error)
	Sets the status of this projection. More...

Additional Inherited Members
Static Public Member Functions inherited from IlvProjection
static IlvProjectionClassInfo *	ClassInfo ()
	Returns the class information of the class. More...
static IlvClassInfo **	ClassInfoRef ()
	Returns the address of the class information of the class. More...
static IlvMapsError	InputError ()
	Returned if the coordinates passed to the forward function are not in a valid range for radian angles.
static IlvMapsError	InvalidEllipsoidError ()
	Returned if you attempt to set a non spherical ellipsoid to a projection that does not support non spherical ellipsoids.
static IlvProjection *	Load (IlvInputFile &inputFile)
	Loads a projection from the specified file. More...
static IlvProjection *	PROJ4ToIlvProjection (const char *PROJ4descriptor, IlvMapsError *status=0)
	Creates the projection specified by proj4Descriptor. More...
static IlvMapsError	ToleranceConditionError ()
	Returned when an internal projection computation fails. Some projections, however, can return more specific error codes in this case.
static IlvMapsError	UnsupportedFeatureError ()
	Returned if an unsupported projection feature is requested, like inverse projection for a projection that does not support inverse projection.

Detailed Description

This class is used to represent an Unknown projection.

You can use an instance of the IlvUnknownProjection class to create an instance of IlvMapInfo when you do not know the projection of your data. This may occur if you load data from a map format which is not georeferenced (such as a Shapefile or dxf file).
The IlvUnknownProjection always returns an error when the forward or inverse method is called.
Library: ilvmaps

See Also

IlvProjection, IlvMapInfo.

Member Function Documentation

virtual IlvProjection* IlvUnknownProjection::copy ( ) const

virtual

Returns a copy of the projection. It must be overridden in each subclass.

Returns

The copy of the object.

Implements IlvProjection.

virtual IlvMapsError IlvUnknownProjection::eForward ( IlvCoordinate &  ll ) const

protectedvirtual

Must be redefined in subclasses to implement the projection for a non spherical ellipsoid.

The default implementation returns IlvProjection::UnsupportedFeatureError().

Parameters

ll	Contains the longitude and latitude coordinates in radian (x = longitude, y = latitude).

Returns

An error code.

Reimplemented from IlvProjection.

virtual IlvMapsError IlvUnknownProjection::eInverse ( IlvCoordinate &  xy ) const

protectedvirtual

Implements the inverse projection for a non spherical ellipsoid.

The default implementation returns IlvProjection::UnsupportedFeatureError().

Parameters

xy	Contains the Cartesian coordinates to inverse.

Returns

An error code.

Reimplemented from IlvProjection.

virtual IlvProjectionClassInfo* IlvUnknownProjection::getClassInfo ( ) const

virtual

Returns the class information for the projection.

Returns

The class information for the projection.

Reimplemented from IlvProjection.

virtual IlvMapsError IlvUnknownProjection::sForward ( IlvCoordinate &  ll ) const

protectedvirtual

Must be redefined in subclasses to implement the projection for a sphere.

Parameters

ll	Contains the longitude and latitude coordinates in radian (x = longitude, y = latitude).

Implements IlvProjection.

virtual IlvMapsError IlvUnknownProjection::sInverse ( IlvCoordinate &  xy ) const

protectedvirtual

Must be redefined in subclasses to implement the inverse projection for a sphere.

The default implementation returns IlvProjection::UnsupportedFeatureError().

Parameters

xy	Contains the Cartesian coordinates to inverse.

Returns

An error code.

Reimplemented from IlvProjection.