IlvGeographicProjection Class Reference

This class defines the Geographic projection. More...

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

Inheritance diagram for IlvGeographicProjection:

List of all members.

Public Member Functions
	IlvGeographicProjection ()
	Constructor.
virtual IlvProjection *	copy () const
	Returns a copy of the projection. It must be overridden in each subclass.
virtual IlvProjectionClassInfo *	getClassInfo () const
	Returns the class information for the projection.
virtual IlvMapsError	setEllipsoid (const IlvEllipsoid &ellipsoid)
	Sets the ellipsoid used for the projection.
Static Public Member Functions
static IlvProjectionClassInfo *	ClassInfo ()
	Returns the class information of the class.
static IlvClassInfo **	ClassInfoRef ()
	Returns the address of the class information of the class.
Protected Member Functions
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.
virtual IlvMapsError	sForward (IlvCoordinate &ll) const
	Must be redefined in subclasses to implement the projection for a sphere.
virtual IlvMapsError	sInverse (IlvCoordinate &xy) const
	Must be redefined in subclasses to implement the inverse projection for a sphere.

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Detailed Description

This class defines the Geographic projection.

It outputs the latitude and longitude in degrees. The unit converter of the projection is initialized by the projection to convert degrees into meters at the equator.

Geographic Projection

Library: ilvmaps

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Constructor & Destructor Documentation

IlvGeographicProjection::IlvGeographicProjection

(

)

Constructor.

Initializes an instance of the class IlvGeographicProjection.

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Member Function Documentation

static IlvProjectionClassInfo* IlvGeographicProjection::ClassInfo

(

)

[static]

Returns the class information of the class.

This static function is also available for the subclasses of IlvProjection.

Returns:

The IlvProjectionClassInfo of the class.

Reimplemented from IlvProjection.

static IlvClassInfo** IlvGeographicProjection::ClassInfoRef

(

)

[static]

Returns the address of the class information of the class.

This static function is also available for the subclasses of IlvProjection.

Returns:

The address of the IlvProjectionClassInfo of the class.

Reimplemented from IlvProjection.

virtual IlvProjection* IlvGeographicProjection::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 IlvProjectionClassInfo* IlvGeographicProjection::getClassInfo

(

)

const [virtual]

Returns the class information for the projection.

Returns:

The class information for the projection.

Reimplemented from IlvProjection.

virtual IL_STDPREF ostream& IlvGeographicProjection::printPROJ4Descriptor	(	IL_STDPREF ostream &	,
		IlvMapsError *	status = 0
	)			const [protected, virtual]

This virtual member function converts the projection to a string in the PROJ4 format.

Parameters:

	ostream	The output stream receiving the string.
	status	IlvMapsError reporting a write error.

Returns:

The output stream.

Reimplemented from IlvProjection.

virtual IlvMapsError IlvGeographicProjection::setEllipsoid

(

const IlvEllipsoid &

ellipsoid

)

[virtual]

Sets the ellipsoid used for the projection.

This virtual member function sets the ellipsoid used for the projection. Most of the projections are initialized with a spherical ellipsoid with a radius of 6,370,997 meters.
This function returns IlvMaps::NoError() if the operation is successful or an error status if you specify a non spherical ellipsoid and your type does not support non spherical.

Parameters:

ellipsoid

The ellipsoid used for the projection.

Returns:

IlvMapsError if the ellipsoid does not match the projection.

Reimplemented from IlvProjection.

virtual IlvMapsError IlvGeographicProjection::sForward

(

IlvCoordinate &

ll

)

const [protected, virtual]

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 IlvGeographicProjection::sInverse

(

IlvCoordinate &

xy

)

const [protected, virtual]

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.