Concrete class representing curve polygons. More...

#include <ogr_geometry.h>

Inheritance diagram for OGRCurvePolygon:

Public Member Functions
	OGRCurvePolygon ()
	Create an empty curve polygon.
	OGRCurvePolygon (const OGRCurvePolygon &)
	Copy constructor.
OGRCurvePolygon &	operator= (const OGRCurvePolygon &other)
	Assignment operator.
virtual const char *	getGeometryName () const CPL_OVERRIDE
	Fetch WKT name for geometry type.
virtual OGRwkbGeometryType	getGeometryType () const CPL_OVERRIDE
	Fetch geometry type.
virtual OGRGeometry *	clone () const CPL_OVERRIDE
	Make a copy of this object.
virtual void	empty () CPL_OVERRIDE
	Clear geometry information.
virtual OGRErr	transform (OGRCoordinateTransformation *poCT) CPL_OVERRIDE
	Apply arbitrary coordinate transformation to geometry.
virtual void	flattenTo2D () CPL_OVERRIDE
	Convert geometry to strictly 2D.
virtual OGRBoolean	IsEmpty () const CPL_OVERRIDE
	Returns TRUE (non-zero) if the object has no points.
virtual void	segmentize (double dfMaxLength) CPL_OVERRIDE
	Modify the geometry such it has no segment longer then the given distance.
virtual OGRBoolean	hasCurveGeometry (int bLookForNonLinear=FALSE) const CPL_OVERRIDE
	Returns if this geometry is or has curve geometry.
virtual OGRGeometry *	getLinearGeometry (double dfMaxAngleStepSizeDegrees=0, const char const papszOptions=NULL) const CPL_OVERRIDE
	Return, possibly approximate, non-curve version of this geometry.
virtual double	get_Area () const CPL_OVERRIDE
	Get the area of the surface object.
virtual OGRErr	PointOnSurface (OGRPoint *poPoint) const CPL_OVERRIDE
	This method relates to the SFCOM ISurface::get_PointOnSurface() method.
virtual int	WkbSize () const CPL_OVERRIDE
	Returns size of related binary representation.
virtual OGRErr	importFromWkb (unsigned char *, int=-1, OGRwkbVariant=wkbVariantOldOgc) CPL_OVERRIDE
	Assign geometry from well known binary data.
virtual OGRErr	exportToWkb (OGRwkbByteOrder, unsigned char *, OGRwkbVariant=wkbVariantOldOgc) const CPL_OVERRIDE
	Convert a geometry into well known binary format.
virtual OGRErr	importFromWkt (char **) CPL_OVERRIDE
	Assign geometry from well known text data.
virtual OGRErr	exportToWkt (char **ppszDstText, OGRwkbVariant eWkbVariant=wkbVariantOldOgc) const CPL_OVERRIDE
	Convert a geometry into well known text format.
virtual int	getDimension () const CPL_OVERRIDE
	Get the dimension of this object.
virtual void	getEnvelope (OGREnvelope *psEnvelope) const CPL_OVERRIDE
	Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure.
virtual void	getEnvelope (OGREnvelope3D *psEnvelope) const CPL_OVERRIDE
	Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure.
virtual OGRPolygon *	CurvePolyToPoly (double dfMaxAngleStepSizeDegrees=0, const char const papszOptions=NULL) const
	Return a polygon from a curve polygon.
virtual OGRBoolean	Equals (OGRGeometry *) const CPL_OVERRIDE
	Returns TRUE if two geometries are equivalent.
virtual OGRBoolean	Intersects (const OGRGeometry *) const CPL_OVERRIDE
	Do these features intersect?
virtual OGRBoolean	Contains (const OGRGeometry *) const CPL_OVERRIDE
	Test for containment.
virtual void	setCoordinateDimension (int nDimension) CPL_OVERRIDE
	Set the coordinate dimension.
virtual void	set3D (OGRBoolean bIs3D) CPL_OVERRIDE
	Add or remove the Z coordinate dimension.
virtual void	setMeasured (OGRBoolean bIsMeasured) CPL_OVERRIDE
	Add or remove the M coordinate dimension.
virtual OGRErr	addRing (OGRCurve *)
	Add a ring to a polygon.
virtual OGRErr	addRingDirectly (OGRCurve *)
	Add a ring to a polygon.
OGRCurve *	getExteriorRingCurve ()
	Fetch reference to external polygon ring.
const OGRCurve *	getExteriorRingCurve () const
	Fetch reference to external polygon ring.
int	getNumInteriorRings () const
	Fetch the number of internal rings.
OGRCurve *	getInteriorRingCurve (int)
	Fetch reference to indicated internal ring.
const OGRCurve *	getInteriorRingCurve (int) const
	Fetch reference to indicated internal ring.
OGRCurve *	stealExteriorRingCurve ()
	"Steal" reference to external ring.
virtual void	swapXY () CPL_OVERRIDE
	Swap x and y coordinates.
Static Protected Member Functions
static OGRPolygon *	CastToPolygon (OGRCurvePolygon *poCP)
	Convert to polygon.

Detailed Description

Concrete class representing curve polygons.

Note that curve polygons consist of one outer (curve) ring, and zero or more inner rings. A curve polygon cannot represent disconnected regions (such as multiple islands in a political body). The OGRMultiSurface must be used for this.

Compatibility: ISO SQL/MM Part 3.

Since:: GDAL 2.0

Constructor & Destructor Documentation

OGRCurvePolygon::OGRCurvePolygon ( const OGRCurvePolygon & other )

Copy constructor.

Note: before GDAL 2.1, only the default implementation of the constructor existed, which could be unsafe to use.

Since:: GDAL 2.1

Member Function Documentation

OGRErr OGRCurvePolygon::addRing ( OGRCurve * poNewRing ) [virtual]

Add a ring to a polygon.

If the polygon has no external ring (it is empty) this will be used as the external ring, otherwise it is used as an internal ring. The passed OGRCurve remains the responsibility of the caller (an internal copy is made).

This method has no SFCOM analog.

Parameters:

poNewRing ring to be added to the polygon.

Returns:: OGRERR_NONE in case of success

OGRErr OGRCurvePolygon::addRingDirectly ( OGRCurve * poNewRing ) [virtual]

Add a ring to a polygon.

If the polygon has no external ring (it is empty) this will be used as the external ring, otherwise it is used as an internal ring. Ownership of the passed ring is assumed by the OGRCurvePolygon, but otherwise this method operates the same as OGRCurvePolygon::AddRing().

This method has no SFCOM analog.

Parameters:

poNewRing ring to be added to the polygon.

Returns:: OGRERR_NONE in case of success

Reimplemented in OGRTriangle.

OGRPolygon * OGRCurvePolygon::CastToPolygon ( OGRCurvePolygon * poCP ) [static, protected]

Convert to polygon.

This method should only be called if the curve polygon actually only contains instances of OGRLineString. This can be verified if hasCurveGeometry(TRUE) returns FALSE. It is not intended to approximate curve polygons. For that use getLinearGeometry().

The passed in geometry is consumed and a new one returned (or NULL in case of failure).

Parameters:

poCP	the input geometry - ownership is passed to the method.

Returns:: new geometry.

OGRGeometry * OGRCurvePolygon::clone ( ) const [virtual]

Make a copy of this object.

This method relates to the SFCOM IGeometry::clone() method.

This method is the same as the C function OGR_G_Clone().

Returns:: a new object instance with the same geometry, and spatial reference system as the original.

Implements OGRGeometry.

OGRBoolean OGRCurvePolygon::Contains ( const OGRGeometry * poOtherGeom ) const [virtual]

Test for containment.

Tests if actual geometry object contains the passed geometry.

This method is the same as the C function OGR_G_Contains().

This method is built on the GEOS library, check it for the definition of the geometry operation. If OGR is built without the GEOS library, this method will always fail, issuing a CPLE_NotSupported error.

Parameters:

poOtherGeom the geometry to compare to this geometry.

Returns:: TRUE if poOtherGeom contains this geometry, otherwise FALSE.

Reimplemented from OGRGeometry.

OGRPolygon * OGRCurvePolygon::CurvePolyToPoly	(	double	dfMaxAngleStepSizeDegrees = `0`,
		const char const	papszOptions = `NULL`
	)		const `[virtual]`

Return a polygon from a curve polygon.

This method is the same as C function OGR_G_CurvePolyToPoly().

The returned geometry is a new instance whose ownership belongs to the caller.

Parameters:

dfMaxAngleStepSizeDegrees	the largest step in degrees along the arc, zero to use the default setting.
papszOptions	options as a null-terminated list of strings. Unused for now. Must be set to NULL.

Returns:: a linestring

Since:: OGR 2.0

Reimplemented in OGRPolygon.

void OGRCurvePolygon::empty ( ) [virtual]

Clear geometry information.

This restores the geometry to it's initial state after construction, and before assignment of actual geometry.

This method relates to the SFCOM IGeometry::Empty() method.

This method is the same as the C function OGR_G_Empty().

Implements OGRGeometry.

OGRBoolean OGRCurvePolygon::Equals ( OGRGeometry * poOtherGeom ) const [virtual]

Returns TRUE if two geometries are equivalent.

This operation implements the SQL/MM ST_OrderingEquals() operation.

The comparison is done in a structural way, that is to say that the geometry types must be identical, as well as the number and ordering of sub-geometries and vertices. Or equivalently, two geometries are considered equal by this method if their WKT/WKB representation is equal. Note: this must be distinguished for equality in a spatial way (which is the purpose of the ST_Equals() operation).

This method is the same as the C function OGR_G_Equals().

Returns:: TRUE if equivalent or FALSE otherwise.

Implements OGRGeometry.

OGRErr OGRCurvePolygon::exportToWkb	(	OGRwkbByteOrder	eByteOrder,
		unsigned char *	pabyData,
		OGRwkbVariant	eWkbVariant = `wkbVariantOldOgc`
	)		const `[virtual]`

Convert a geometry into well known binary format.

This method relates to the SFCOM IWks::ExportToWKB() method.

This method is the same as the C function OGR_G_ExportToWkb() or OGR_G_ExportToIsoWkb(), depending on the value of eWkbVariant.

Parameters:

eByteOrder	One of wkbXDR or wkbNDR indicating MSB or LSB byte order respectively.
pabyData	a buffer into which the binary representation is written. This buffer must be at least OGRGeometry::WkbSize() byte in size.
eWkbVariant	What standard to use when exporting geometries with three dimensions (or more). The default wkbVariantOldOgc is the historical OGR variant. wkbVariantIso is the variant defined in ISO SQL/MM and adopted by OGC for SFSQL 1.2.

Returns:: Currently OGRERR_NONE is always returned.

Implements OGRGeometry.

Reimplemented in OGRPolygon.

OGRErr OGRCurvePolygon::exportToWkt	(	char **	ppszDstText,
		OGRwkbVariant	eWkbVariant = `wkbVariantOldOgc`
	)		const `[virtual]`

Convert a geometry into well known text format.

This method relates to the SFCOM IWks::ExportToWKT() method.

This method is the same as the C function OGR_G_ExportToWkt().

Parameters:

ppszDstText	a text buffer is allocated by the program, and assigned to the passed pointer. After use, *ppszDstText should be freed with CPLFree().
eWkbVariant	the specification that must be conformed too : wbkVariantOgc for old-style 99-402 extended dimension (Z) WKB types wbkVariantIso for SFSQL 1.2 and ISO SQL/MM Part 3

Returns:: Currently OGRERR_NONE is always returned.

Implements OGRGeometry.

Reimplemented in OGRPolygon.

void OGRCurvePolygon::flattenTo2D ( ) [virtual]

Convert geometry to strictly 2D.

In a sense this converts all Z coordinates to 0.0.

This method is the same as the C function OGR_G_FlattenTo2D().

Implements OGRGeometry.

double OGRCurvePolygon::get_Area ( ) const [virtual]

Get the area of the surface object.

For polygons the area is computed as the area of the outer ring less the area of all internal rings.

This method relates to the SFCOM ISurface::get_Area() method.

Returns:: the area of the feature in square units of the spatial reference system in use.

Implements OGRSurface.

int OGRCurvePolygon::getDimension ( ) const [virtual]

Get the dimension of this object.

This method corresponds to the SFCOM IGeometry::GetDimension() method. It indicates the dimension of the object, but does not indicate the dimension of the underlying space (as indicated by OGRGeometry::getCoordinateDimension()).

This method is the same as the C function OGR_G_GetDimension().

Returns:: 0 for points, 1 for lines and 2 for surfaces.

Implements OGRGeometry.

void OGRCurvePolygon::getEnvelope ( OGREnvelope * psEnvelope ) const [virtual]

Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure.

This method is the same as the C function OGR_G_GetEnvelope().

Parameters:

psEnvelope the structure in which to place the results.

Implements OGRGeometry.

void OGRCurvePolygon::getEnvelope ( OGREnvelope3D * psEnvelope ) const [virtual]

Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure.

This method is the same as the C function OGR_G_GetEnvelope3D().

Parameters:

psEnvelope the structure in which to place the results.

Since:: OGR 1.9.0

Implements OGRGeometry.

OGRCurve * OGRCurvePolygon::getExteriorRingCurve ( )

Fetch reference to external polygon ring.

Note that the returned ring pointer is to an internal data object of the OGRCurvePolygon. It should not be modified or deleted by the application, and the pointer is only valid till the polygon is next modified. Use the OGRGeometry::clone() method to make a separate copy within the application.

Relates to the Simple Features for COM (SFCOM) IPolygon::get_ExteriorRing() method. TODO(rouault): What does that mean?

Returns:: pointer to external ring. May be NULL if the OGRCurvePolygon is empty.

const OGRCurve * OGRCurvePolygon::getExteriorRingCurve ( ) const

Fetch reference to external polygon ring.

Note that the returned ring pointer is to an internal data object of the OGRCurvePolygon. It should not be modified or deleted by the application, and the pointer is only valid till the polygon is next modified. Use the OGRGeometry::clone() method to make a separate copy within the application.

Relates to the SFCOM IPolygon::get_ExteriorRing() method.

Returns:: pointer to external ring. May be NULL if the OGRCurvePolygon is empty.

const char * OGRCurvePolygon::getGeometryName ( ) const [virtual]

Fetch WKT name for geometry type.

There is no SFCOM analog to this method.

This method is the same as the C function OGR_G_GetGeometryName().

Returns:: name used for this geometry type in well known text format. The returned pointer is to a static internal string and should not be modified or freed.

Implements OGRGeometry.

Reimplemented in OGRTriangle, and OGRPolygon.

OGRwkbGeometryType OGRCurvePolygon::getGeometryType ( ) const [virtual]

Fetch geometry type.

Note that the geometry type may include the 2.5D flag. To get a 2D flattened version of the geometry type apply the wkbFlatten() macro to the return result.

This method is the same as the C function OGR_G_GetGeometryType().

Returns:: the geometry type code.

Implements OGRGeometry.

Reimplemented in OGRTriangle, and OGRPolygon.

OGRCurve * OGRCurvePolygon::getInteriorRingCurve ( int iRing )

Fetch reference to indicated internal ring.

Note that the returned ring pointer is to an internal data object of the OGRCurvePolygon. It should not be modified or deleted by the application, and the pointer is only valid till the polygon is next modified. Use the OGRGeometry::clone() method to make a separate copy within the application.

Relates to the SFCOM IPolygon::get_InternalRing() method.

Parameters:

iRing internal ring index from 0 to getNumInteriorRings() - 1.

Returns:: pointer to interior ring. May be NULL.

const OGRCurve * OGRCurvePolygon::getInteriorRingCurve ( int iRing ) const

Fetch reference to indicated internal ring.

Note that the returned ring pointer is to an internal data object of the OGRCurvePolygon. It should not be modified or deleted by the application, and the pointer is only valid till the polygon is next modified. Use the OGRGeometry::clone() method to make a separate copy within the application.

Relates to the SFCOM IPolygon::get_InternalRing() method.

Parameters:

iRing internal ring index from 0 to getNumInteriorRings() - 1.

Returns:: pointer to interior ring. May be NULL.

OGRGeometry * OGRCurvePolygon::getLinearGeometry	(	double	dfMaxAngleStepSizeDegrees = `0`,
		const char const	papszOptions = `NULL`
	)		const `[virtual]`

Return, possibly approximate, non-curve version of this geometry.

Returns a geometry that has no CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, MULTICURVE or MULTISURFACE in it, by approximating curve geometries.

The ownership of the returned geometry belongs to the caller.

The reverse method is OGRGeometry::getCurveGeometry().

This method is the same as the C function OGR_G_GetLinearGeometry().

Parameters:

dfMaxAngleStepSizeDegrees	the largest step in degrees along the arc, zero to use the default setting.
papszOptions	options as a null-terminated list of strings. See OGRGeometryFactory::curveToLineString() for valid options.

Returns:: a new geometry.

Since:: GDAL 2.0

Reimplemented from OGRGeometry.

Reimplemented in OGRPolygon.

int OGRCurvePolygon::getNumInteriorRings ( ) const

Fetch the number of internal rings.

Relates to the SFCOM IPolygon::get_NumInteriorRings() method.

Returns:: count of internal rings, zero or more.

OGRBoolean OGRCurvePolygon::hasCurveGeometry ( int bLookForNonLinear = FALSE ) const [virtual]

Returns if this geometry is or has curve geometry.

Returns if a geometry is, contains or may contain a CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, MULTICURVE or MULTISURFACE.

If bLookForNonLinear is set to TRUE, it will be actually looked if the geometry or its subgeometries are or contain a non-linear geometry in them. In which case, if the method returns TRUE, it means that getLinearGeometry() would return an approximate version of the geometry. Otherwise, getLinearGeometry() would do a conversion, but with just converting container type, like COMPOUNDCURVE -> LINESTRING, MULTICURVE -> MULTILINESTRING or MULTISURFACE -> MULTIPOLYGON, resulting in a "loss-less" conversion.

This method is the same as the C function OGR_G_HasCurveGeometry().

Parameters:

bLookForNonLinear set it to TRUE to check if the geometry is or contains a CIRCULARSTRING.

Returns:: TRUE if this geometry is or has curve geometry.

Since:: GDAL 2.0

Reimplemented from OGRGeometry.

Reimplemented in OGRPolygon.

OGRErr OGRCurvePolygon::importFromWkb	(	unsigned char *	pabyData,
		int	nSize = `-1`,
		OGRwkbVariant	eWkbVariant = `wkbVariantOldOgc`
	)		`[virtual]`

Assign geometry from well known binary data.

The object must have already been instantiated as the correct derived type of geometry object to match the binaries type. This method is used by the OGRGeometryFactory class, but not normally called by application code.

This method relates to the SFCOM IWks::ImportFromWKB() method.

This method is the same as the C function OGR_G_ImportFromWkb().

Parameters:

pabyData	the binary input data.
nSize	the size of pabyData in bytes, or zero if not known.
eWkbVariant	if wkbVariantPostGIS1, special interpretation is done for curve geometries code

Returns:: OGRERR_NONE if all goes well, otherwise any of OGRERR_NOT_ENOUGH_DATA, OGRERR_UNSUPPORTED_GEOMETRY_TYPE, or OGRERR_CORRUPT_DATA may be returned.

Implements OGRGeometry.

Reimplemented in OGRTriangle, and OGRPolygon.

OGRErr OGRCurvePolygon::importFromWkt ( char ** ppszInput ) [virtual]

Assign geometry from well known text data.

The object must have already been instantiated as the correct derived type of geometry object to match the text type. This method is used by the OGRGeometryFactory class, but not normally called by application code.

This method relates to the SFCOM IWks::ImportFromWKT() method.

This method is the same as the C function OGR_G_ImportFromWkt().

Parameters:

ppszInput pointer to a pointer to the source text. The pointer is updated to pointer after the consumed text.

Returns:: OGRERR_NONE if all goes well, otherwise any of OGRERR_NOT_ENOUGH_DATA, OGRERR_UNSUPPORTED_GEOMETRY_TYPE, or OGRERR_CORRUPT_DATA may be returned.

Implements OGRGeometry.

Reimplemented in OGRPolygon.

OGRBoolean OGRCurvePolygon::Intersects ( const OGRGeometry * poOtherGeom ) const [virtual]

Do these features intersect?

Determines whether two geometries intersect. If GEOS is enabled, then this is done in rigorous fashion otherwise TRUE is returned if the envelopes (bounding boxes) of the two geometries overlap.

The poOtherGeom argument may be safely NULL, but in this case the method will always return TRUE. That is, a NULL geometry is treated as being everywhere.

This method is the same as the C function OGR_G_Intersects().

Parameters:

poOtherGeom the other geometry to test against.

Returns:: TRUE if the geometries intersect, otherwise FALSE.

Reimplemented from OGRGeometry.

OGRBoolean OGRCurvePolygon::IsEmpty ( ) const [virtual]

Returns TRUE (non-zero) if the object has no points.

Normally this returns FALSE except between when an object is instantiated and points have been assigned.

This method relates to the SFCOM IGeometry::IsEmpty() method.

Returns:: TRUE if object is empty, otherwise FALSE.

Implements OGRGeometry.

OGRCurvePolygon & OGRCurvePolygon::operator= ( const OGRCurvePolygon & other )

Assignment operator.

Note: before GDAL 2.1, only the default implementation of the operator existed, which could be unsafe to use.

Since:: GDAL 2.1

OGRErr OGRCurvePolygon::PointOnSurface ( OGRPoint * poPoint ) const [virtual]

This method relates to the SFCOM ISurface::get_PointOnSurface() method.

NOTE: Only implemented when GEOS included in build.

Parameters:

poPoint point to be set with an internal point.

Returns:: OGRERR_NONE if it succeeds or OGRERR_FAILURE otherwise.

Implements OGRSurface.

Reimplemented in OGRPolygon.

void OGRCurvePolygon::segmentize ( double dfMaxLength ) [virtual]

Modify the geometry such it has no segment longer then the given distance.

Add intermediate vertices to a geometry.

Interpolated points will have Z and M values (if needed) set to 0. Distance computation is performed in 2d only

This function is the same as the C function OGR_G_Segmentize()

Parameters:

dfMaxLength the maximum distance between 2 points after segmentization

This method modifies the geometry to add intermediate vertices if necessary so that the maximum length between 2 consecutive vertices is lower than dfMaxLength.

Parameters:

dfMaxLength maximum length between 2 consecutive vertices.

Reimplemented from OGRGeometry.

void OGRCurvePolygon::set3D ( OGRBoolean bIs3D ) [virtual]

Add or remove the Z coordinate dimension.

This method adds or removes the explicit Z coordinate dimension. Removing the Z coordinate dimension of a geometry will remove any existing Z values. Adding the Z dimension to a geometry collection, a compound curve, a polygon, etc. will affect the children geometries.

Parameters:

bIs3D Should the geometry have a Z dimension, either TRUE or FALSE.

Since:: GDAL 2.1

Reimplemented from OGRGeometry.

void OGRCurvePolygon::setCoordinateDimension ( int nNewDimension ) [virtual]

Set the coordinate dimension.

This method sets the explicit coordinate dimension. Setting the coordinate dimension of a geometry to 2 should zero out any existing Z values. Setting the dimension of a geometry collection, a compound curve, a polygon, etc. will affect the children geometries. This will also remove the M dimension if present before this call.

Deprecated:: use set3D() or setMeasured().

Parameters:

nNewDimension New coordinate dimension value, either 2 or 3.

Reimplemented from OGRGeometry.

void OGRCurvePolygon::setMeasured ( OGRBoolean bIsMeasured ) [virtual]

Add or remove the M coordinate dimension.

This method adds or removes the explicit M coordinate dimension. Removing the M coordinate dimension of a geometry will remove any existing M values. Adding the M dimension to a geometry collection, a compound curve, a polygon, etc. will affect the children geometries.

Parameters:

bIsMeasured Should the geometry have a M dimension, either TRUE or FALSE.

Since:: GDAL 2.1

Reimplemented from OGRGeometry.

OGRCurve * OGRCurvePolygon::stealExteriorRingCurve ( )

"Steal" reference to external ring.

After the call to that function, only call to stealInteriorRing() or destruction of the OGRCurvePolygon is valid. Other operations may crash.

Returns:: pointer to external ring. May be NULL if the OGRCurvePolygon is empty.

void OGRCurvePolygon::swapXY ( ) [virtual]

Swap x and y coordinates.

Since:: OGR 1.8.0

Reimplemented from OGRGeometry.

OGRErr OGRCurvePolygon::transform ( OGRCoordinateTransformation * poCT ) [virtual]

Apply arbitrary coordinate transformation to geometry.

This method will transform the coordinates of a geometry from their current spatial reference system to a new target spatial reference system. Normally this means reprojecting the vectors, but it could include datum shifts, and changes of units.

Note that this method does not require that the geometry already have a spatial reference system. It will be assumed that they can be treated as having the source spatial reference system of the OGRCoordinateTransformation object, and the actual SRS of the geometry will be ignored. On successful completion the output OGRSpatialReference of the OGRCoordinateTransformation will be assigned to the geometry.

This method is the same as the C function OGR_G_Transform().

Parameters:

poCT	the transformation to apply.

Returns:: OGRERR_NONE on success or an error code.

Implements OGRGeometry.

int OGRCurvePolygon::WkbSize ( ) const [virtual]

Returns size of related binary representation.

This method returns the exact number of bytes required to hold the well known binary representation of this geometry object. Its computation may be slightly expensive for complex geometries.

This method relates to the SFCOM IWks::WkbSize() method.

This method is the same as the C function OGR_G_WkbSize().

Returns:: size of binary representation in bytes.

Implements OGRGeometry.

Reimplemented in OGRPolygon.

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

ogr_geometry.h
ogrcurvepolygon.cpp

Public Member Functions

Static Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation