IlvHorizontalShiftDatum Class Reference

This class describes a horizontal datum. More...

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

Inheritance diagram for IlvHorizontalShiftDatum:

List of all members.

Public Member Functions
	IlvHorizontalShiftDatum (const IlvHorizontalShiftDatum &source)
	Initializes a new instance of the IlvHorizontalShiftDatum by copying specified horizontal shift datum.
	IlvHorizontalShiftDatum (const char *name, const char *regionOfUse, const IlvEllipsoid &ellipsoid, IlDouble dx, IlDouble dy, IlDouble dz)
	Initializes an instance of the IlvHorizontalShiftDatum class.
virtual IlvHorizontalDatum *	copy () const
	Returns a new copy of this IlvHorizontalShiftDatum.
IlBoolean	equivalent (const IlvHorizontalDatum *datum) const
	Returns IlTrue if the specified datum is equivalent to this.
IlDouble	getDX () const
	Returns the shift on the X axis, in meters.
IlDouble	getDY () const
	Returns the shift on the Y axis, in meters.
IlDouble	getDZ () const
	Returns the shift on the Z axis, in meters.
const char *	getName () const
	Returns the name of the ellipsoid.
const char *	getRegionOfUse () const
	Returns the name of the region where the datum is used in.
virtual void	write (IlvOutputFile &) const
	Write the object to an IlvOutputFile.
Static Public Member Functions
static const IlvHorizontalShiftDatum *	WGS84 ()
	The WGS84 datum.

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Detailed Description

This class describes a horizontal datum.

Library: ilvmaps

A horizontal datum is defined by a translation of the ellipsoid. Usually, the translation is performed so that the translated ellipsoid is tangent to the geoid surface in the region of interest. An IlvHorizontalShiftDatum object is based on the shift parameters relative to the WGS84 datum used by the Molodensky formula.

See also:

IlvMolodenskyConverter.

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Constructor & Destructor Documentation

IlvHorizontalShiftDatum::IlvHorizontalShiftDatum	(	const char *	name,
		const char *	regionOfUse,
		const IlvEllipsoid &	ellipsoid,
		IlDouble	dx,
		IlDouble	dy,
		IlDouble	dz
	)

Initializes an instance of the IlvHorizontalShiftDatum class.

Parameters:

	name	Name of the datum. This string is duplicated by the constructor.
	regionOfUse	String describing the region this datum is used. This string is duplicated by the constructor.
	dx	Shift on the x axis, in meters.
	dy	Shift on the y axis, in meters.
	dz	Shift on the z axis, in meters.

IlvHorizontalShiftDatum::IlvHorizontalShiftDatum

(

const IlvHorizontalShiftDatum &

source

)

Initializes a new instance of the IlvHorizontalShiftDatum by copying specified horizontal shift datum.

Parameters:

source

The source datum to be copied.

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Member Function Documentation

IlBoolean IlvHorizontalShiftDatum::equivalent

(

const IlvHorizontalDatum *

d

)

const [virtual]

Returns IlTrue if the specified datum is equivalent to this.

Parameters:

datum

The datum to test against.

Returns:

IlTrue if the specified datum describes the same coordinate system as this datum.

Implements IlvHorizontalDatum.

virtual void IlvHorizontalShiftDatum::write

(

IlvOutputFile &

file

)

const [virtual]

Write the object to an IlvOutputFile.

This method saves the parameters of a horizontal datum to the specified output file. This method has to be overridden by subclasses of IlvHorizontalDatum that need to save additional parameters.

This method should not be directly called. The method save() should be used instead.

Parameters:

file

The output file.

Reimplemented from IlvHorizontalDatum.