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Maps Package API Reference Guide

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IlvUnknownProjection Class Reference

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

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

Inheritance diagram for IlvUnknownProjection:
IlvProjection

List of all members.

Public Member Functions

 IlvUnknownProjection ()
 Initializes an instance of the IlvUnknownProjection class.
virtual IlvProjectioncopy () const
 Returns a copy of the projection. It must be overridden in each subclass.
virtual IlvProjectionClassInfogetClassInfo () const
 Returns the class information for the projection.

Static Public Member Functions

static IlvProjectionClassInfoClassInfo ()
 Returns the class information of the class.
static IlvClassInfo ** ClassInfoRef ()
 Returns the address of the class information of the class.

Protected Member Functions

virtual IlvMapsError eForward (IlvCoordinate &ll) const
 Must be redefined in subclasses to implement the projection for a non spherical ellipsoid.
virtual IlvMapsError eInverse (IlvCoordinate &xy) const
 Implements the inverse projection for a non spherical ellipsoid.
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.

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

static IlvProjectionClassInfo* IlvUnknownProjection::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** IlvUnknownProjection::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* 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 [protected, virtual]

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 [protected, virtual]

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 [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 IlvUnknownProjection::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.

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