OGRMultiCurve Class Reference

A collection of OGRCurve. More...

#include <ogr_geometry.h>

Inheritance diagram for OGRMultiCurve:

Public Types
typedef OGRCurve	ChildType
	Type of child elements. More...
Public Types inherited from OGRGeometryCollection
typedef OGRGeometry	ChildType
	Type of child elements. More...

Public Member Functions
	OGRMultiCurve ()
	Create an empty multi curve collection.
	OGRMultiCurve (const OGRMultiCurve &other)
	Copy constructor. More...
OGRMultiCurve &	operator= (const OGRMultiCurve &other)
	Assignment operator. More...
ChildType **	begin ()
	Return begin of iterator. More...
ChildType **	end ()
	Return end of iterator.
const ChildType *const *	begin () const
	Return begin of iterator. More...
const ChildType *const *	end () const
	Return end of iterator.
virtual const char *	getGeometryName () const override
	Fetch WKT name for geometry type. More...
virtual OGRwkbGeometryType	getGeometryType () const override
	Fetch geometry type. More...
OGRErr	importFromWkt (const char **) override
	deprecated
virtual OGRErr	exportToWkt (char **, OGRwkbVariant=wkbVariantOldOgc) const override
	Convert a geometry into well known text format. More...
virtual int	getDimension () const override
	Get the dimension of this object. More...
virtual OGRBoolean	hasCurveGeometry (int bLookForNonLinear=FALSE) const override
	Returns if this geometry is or has curve geometry. More...
OGRGeometryCollection *	toUpperClass ()
	Return pointer of this in upper class.
const OGRGeometryCollection *	toUpperClass () const
	Return pointer of this in upper class.
virtual void	accept (IOGRGeometryVisitor *visitor) override
	Accept a visitor. More...
virtual void	accept (IOGRConstGeometryVisitor *visitor) const override
	Accept a visitor. More...
Public Member Functions inherited from OGRGeometryCollection
	OGRGeometryCollection ()
	Create an empty geometry collection.
	OGRGeometryCollection (const OGRGeometryCollection &other)
	Copy constructor. More...
OGRGeometryCollection &	operator= (const OGRGeometryCollection &other)
	Assignment operator. More...
ChildType **	begin ()
	Return begin of sub-geometry iterator. More...
ChildType **	end ()
	Return end of sub-geometry iterator. More...
const ChildType *const *	begin () const
	Return begin of sub-geometry iterator. More...
const ChildType *const *	end () const
	Return end of sub-geometry iterator. More...
virtual OGRGeometry *	clone () const override
	Make a copy of this object. More...
virtual void	empty () override
	Clear geometry information. More...
virtual OGRErr	transform (OGRCoordinateTransformation *poCT) override
	Apply arbitrary coordinate transformation to geometry. More...
virtual void	flattenTo2D () override
	Convert geometry to strictly 2D. More...
virtual OGRBoolean	IsEmpty () const override
	Returns TRUE (non-zero) if the object has no points. More...
virtual void	segmentize (double dfMaxLength) override
	Modify the geometry such it has no segment longer then the given distance. More...
virtual OGRGeometry *	getCurveGeometry (const char *const *papszOptions=nullptr) const override
	Return curve version of this geometry. More...
virtual OGRGeometry *	getLinearGeometry (double dfMaxAngleStepSizeDegrees=0, const char *const *papszOptions=nullptr) const override
	Return, possibly approximate, non-curve version of this geometry. More...
virtual int	WkbSize () const override
	Returns size of related binary representation. More...
virtual OGRErr	importFromWkb (const unsigned char *, int, OGRwkbVariant, int &nBytesConsumedOut) override
	Assign geometry from well known binary data. More...
virtual OGRErr	exportToWkb (OGRwkbByteOrder, unsigned char *, OGRwkbVariant=wkbVariantOldOgc) const override
	Convert a geometry into well known binary format. More...
virtual double	get_Length () const
	Compute the length of a multicurve. More...
virtual double	get_Area () const
	Compute area of geometry collection. More...
virtual void	getEnvelope (OGREnvelope *psEnvelope) const override
	Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure. More...
virtual void	getEnvelope (OGREnvelope3D *psEnvelope) const override
	Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure. More...
int	getNumGeometries () const
	Fetch number of geometries in container. More...
OGRGeometry *	getGeometryRef (int)
	Fetch geometry from container. More...
const OGRGeometry *	getGeometryRef (int) const
	Fetch geometry from container. More...
virtual OGRBoolean	Equals (const OGRGeometry *) const override
	Returns TRUE if two geometries are equivalent. More...
virtual void	setCoordinateDimension (int nDimension) override
	Set the coordinate dimension. More...
virtual void	set3D (OGRBoolean bIs3D) override
	Add or remove the Z coordinate dimension. More...
virtual void	setMeasured (OGRBoolean bIsMeasured) override
	Add or remove the M coordinate dimension. More...
virtual OGRErr	addGeometry (const OGRGeometry *)
	Add a geometry to the container. More...
virtual OGRErr	addGeometryDirectly (OGRGeometry *)
	Add a geometry directly to the container. More...
virtual OGRErr	removeGeometry (int iIndex, int bDelete=TRUE)
	Remove a geometry from the container. More...
virtual void	assignSpatialReference (OGRSpatialReference *poSR) override
	Assign spatial reference to this object. More...
void	closeRings () override
	Force rings to be closed. More...
virtual void	swapXY () override
	Swap x and y coordinates. More...
Public Member Functions inherited from OGRGeometry
	OGRGeometry (const OGRGeometry &other)
	Copy constructor. More...
OGRGeometry &	operator= (const OGRGeometry &other)
	Assignment operator. More...
bool	operator== (const OGRGeometry &other) const
	Returns if two geometries are equal. More...
bool	operator!= (const OGRGeometry &other) const
	Returns if two geometries are different. More...
virtual int	getCoordinateDimension () const
	Get the dimension of the coordinates in this object. More...
int	CoordinateDimension () const
	Get the dimension of the coordinates in this object. More...
virtual OGRBoolean	IsValid () const
	Test if the geometry is valid. More...
virtual OGRBoolean	IsSimple () const
	Test if the geometry is simple. More...
OGRBoolean	Is3D () const
OGRBoolean	IsMeasured () const
virtual OGRBoolean	IsRing () const
	Test if the geometry is a ring. More...
OGRErr	importFromWkb (const GByte *, int=-1, OGRwkbVariant=wkbVariantOldOgc)
	Assign geometry from well known binary data. More...
OGRErr	importFromWkt (char **ppszInput) CPL_WARN_DEPRECATED("Use importFromWkt( const char**) instead")
	Deprecated. More...
OGRwkbGeometryType	getIsoGeometryType () const
	Get the geometry type that conforms with ISO SQL/MM Part3. More...
virtual void	dumpReadable (FILE *, const char *=nullptr, char **papszOptions=nullptr) const
	Dump geometry in well known text format to indicated output file. More...
virtual char *	exportToGML (const char *const *papszOptions=nullptr) const
	Convert a geometry into GML format. More...
virtual char *	exportToKML () const
	Convert a geometry into KML format. More...
virtual char *	exportToJson () const
	Convert a geometry into GeoJSON format. More...
virtual GEOSGeom	exportToGEOS (GEOSContextHandle_t hGEOSCtxt) const CPL_WARN_UNUSED_RESULT
	Returns a GEOSGeom object corresponding to the geometry. More...
OGRSpatialReference *	getSpatialReference (void) const
	Returns spatial reference system for object. More...
OGRErr	transformTo (OGRSpatialReference *poSR)
	Transform geometry to new spatial reference system. More...
virtual OGRBoolean	Intersects (const OGRGeometry *) const
	Do these features intersect? More...
virtual OGRBoolean	Disjoint (const OGRGeometry *) const
	Test for disjointness. More...
virtual OGRBoolean	Touches (const OGRGeometry *) const
	Test for touching. More...
virtual OGRBoolean	Crosses (const OGRGeometry *) const
	Test for crossing. More...
virtual OGRBoolean	Within (const OGRGeometry *) const
	Test for containment. More...
virtual OGRBoolean	Contains (const OGRGeometry *) const
	Test for containment. More...
virtual OGRBoolean	Overlaps (const OGRGeometry *) const
	Test for overlap. More...
virtual OGRGeometry *	Boundary () const CPL_WARN_UNUSED_RESULT
	Compute boundary. More...
virtual double	Distance (const OGRGeometry *) const
	Compute distance between two geometries. More...
virtual OGRGeometry *	ConvexHull () const CPL_WARN_UNUSED_RESULT
	Compute convex hull. More...
virtual OGRGeometry *	Buffer (double dfDist, int nQuadSegs=30) const CPL_WARN_UNUSED_RESULT
	Compute buffer of geometry. More...
virtual OGRGeometry *	Intersection (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
	Compute intersection. More...
virtual OGRGeometry *	Union (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
	Compute union. More...
virtual OGRGeometry *	UnionCascaded () const CPL_WARN_UNUSED_RESULT
	Compute union using cascading. More...
virtual OGRGeometry *	Difference (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
	Compute difference. More...
virtual OGRGeometry *	SymDifference (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
	Compute symmetric difference. More...
virtual OGRErr	Centroid (OGRPoint *poPoint) const
	Compute the geometry centroid. More...
virtual OGRGeometry *	Simplify (double dTolerance) const CPL_WARN_UNUSED_RESULT
	Simplify the geometry. More...
OGRGeometry *	SimplifyPreserveTopology (double dTolerance) const CPL_WARN_UNUSED_RESULT
	Simplify the geometry while preserving topology. More...
virtual OGRGeometry *	DelaunayTriangulation (double dfTolerance, int bOnlyEdges) const CPL_WARN_UNUSED_RESULT
	Return a Delaunay triangulation of the vertices of the geometry. More...
virtual OGRGeometry *	Polygonize () const CPL_WARN_UNUSED_RESULT
	Polygonizes a set of sparse edges. More...
virtual double	Distance3D (const OGRGeometry *poOtherGeom) const
	Returns the 3D distance between two geometries. More...
OGRPoint *	toPoint ()
	Down-cast to OGRPoint*. More...
const OGRPoint *	toPoint () const
	Down-cast to OGRPoint*. More...
OGRCurve *	toCurve ()
	Down-cast to OGRCurve*. More...
const OGRCurve *	toCurve () const
	Down-cast to OGRCurve*. More...
OGRSimpleCurve *	toSimpleCurve ()
	Down-cast to OGRSimpleCurve*. More...
const OGRSimpleCurve *	toSimpleCurve () const
	Down-cast to OGRSimpleCurve*. More...
OGRLineString *	toLineString ()
	Down-cast to OGRLineString*. More...
const OGRLineString *	toLineString () const
	Down-cast to OGRLineString*. More...
OGRLinearRing *	toLinearRing ()
	Down-cast to OGRLinearRing*. More...
const OGRLinearRing *	toLinearRing () const
	Down-cast to OGRLinearRing*. More...
OGRCircularString *	toCircularString ()
	Down-cast to OGRCircularString*. More...
const OGRCircularString *	toCircularString () const
	Down-cast to OGRCircularString*. More...
OGRCompoundCurve *	toCompoundCurve ()
	Down-cast to OGRCompoundCurve*. More...
const OGRCompoundCurve *	toCompoundCurve () const
	Down-cast to OGRCompoundCurve*. More...
OGRSurface *	toSurface ()
	Down-cast to OGRSurface*. More...
const OGRSurface *	toSurface () const
	Down-cast to OGRSurface*. More...
OGRPolygon *	toPolygon ()
	Down-cast to OGRPolygon*. More...
const OGRPolygon *	toPolygon () const
	Down-cast to OGRPolygon*. More...
OGRTriangle *	toTriangle ()
	Down-cast to OGRTriangle*. More...
const OGRTriangle *	toTriangle () const
	Down-cast to OGRTriangle*. More...
OGRCurvePolygon *	toCurvePolygon ()
	Down-cast to OGRCurvePolygon*. More...
const OGRCurvePolygon *	toCurvePolygon () const
	Down-cast to OGRCurvePolygon*. More...
OGRGeometryCollection *	toGeometryCollection ()
	Down-cast to OGRGeometryCollection*. More...
const OGRGeometryCollection *	toGeometryCollection () const
	Down-cast to OGRGeometryCollection*. More...
OGRMultiPoint *	toMultiPoint ()
	Down-cast to OGRMultiPoint*. More...
const OGRMultiPoint *	toMultiPoint () const
	Down-cast to OGRMultiPoint*. More...
OGRMultiLineString *	toMultiLineString ()
	Down-cast to OGRMultiLineString*. More...
const OGRMultiLineString *	toMultiLineString () const
	Down-cast to OGRMultiLineString*. More...
OGRMultiPolygon *	toMultiPolygon ()
	Down-cast to OGRMultiPolygon*. More...
const OGRMultiPolygon *	toMultiPolygon () const
	Down-cast to OGRMultiPolygon*. More...
OGRMultiCurve *	toMultiCurve ()
	Down-cast to OGRMultiCurve*. More...
const OGRMultiCurve *	toMultiCurve () const
	Down-cast to OGRMultiCurve*. More...
OGRMultiSurface *	toMultiSurface ()
	Down-cast to OGRMultiSurface*. More...
const OGRMultiSurface *	toMultiSurface () const
	Down-cast to OGRMultiSurface*. More...
OGRPolyhedralSurface *	toPolyhedralSurface ()
	Down-cast to OGRPolyhedralSurface*. More...
const OGRPolyhedralSurface *	toPolyhedralSurface () const
	Down-cast to OGRPolyhedralSurface*. More...
OGRTriangulatedSurface *	toTriangulatedSurface ()
	Down-cast to OGRTriangulatedSurface*. More...
const OGRTriangulatedSurface *	toTriangulatedSurface () const
	Down-cast to OGRTriangulatedSurface*. More...

Static Public Member Functions
static OGRMultiLineString *	CastToMultiLineString (OGRMultiCurve *poMC)
	Cast to multi line string. More...
Static Public Member Functions inherited from OGRGeometryCollection
static OGRGeometryCollection *	CastToGeometryCollection (OGRGeometryCollection *poSrc)
	Cast to geometry collection. More...
Static Public Member Functions inherited from OGRGeometry
static GEOSContextHandle_t	createGEOSContext ()
	Create a new GEOS context. More...
static void	freeGEOSContext (GEOSContextHandle_t hGEOSCtxt)
	Destroy a GEOS context. More...
static OGRGeometryH	ToHandle (OGRGeometry *poGeom)
	Convert a OGRGeometry* to a OGRGeometryH. More...
static OGRGeometry *	FromHandle (OGRGeometryH hGeom)
	Convert a OGRGeometryH to a OGRGeometry*. More...

Protected Member Functions
virtual OGRBoolean	isCompatibleSubType (OGRwkbGeometryType) const override
	Returns whether a geometry of the specified geometry type can be a member of this collection. More...

Detailed Description

A collection of OGRCurve.

Since

GDAL 2.0

Member Typedef Documentation

ChildType

typedef OGRCurve OGRMultiCurve::ChildType

Type of child elements.

Constructor & Destructor Documentation

OGRMultiCurve()

OGRMultiCurve::OGRMultiCurve ( const OGRMultiCurve &  other )

default

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

accept() [1/2]

virtual void OGRMultiCurve::accept ( IOGRGeometryVisitor *  visitor )

inlineoverridevirtual

Accept a visitor.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

accept() [2/2]

virtual void OGRMultiCurve::accept ( IOGRConstGeometryVisitor *  visitor ) const

inlineoverridevirtual

Accept a visitor.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

begin() [1/2]

ChildType** OGRMultiCurve::begin ( )

inline

Return begin of iterator.

Since

GDAL 2.3

begin() [2/2]

const ChildType* const* OGRMultiCurve::begin ( ) const

inline

Return begin of iterator.

Since

GDAL 2.3

CastToMultiLineString()

OGRMultiLineString * OGRMultiCurve::CastToMultiLineString ( OGRMultiCurve *  poMC )

static

Cast to multi line string.

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

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

Parameters

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

Returns

new geometry.

exportToWkt()

OGRErr OGRMultiCurve::exportToWkt ( char **  ppszDstText, OGRwkbVariant  eWkbVariant = wkbVariantOldOgc  ) const

overridevirtual

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.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

getDimension()

int OGRMultiCurve::getDimension ( ) const

overridevirtual

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.

Reimplemented from OGRGeometryCollection.

getGeometryName()

const char * OGRMultiCurve::getGeometryName ( ) const

overridevirtual

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.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

getGeometryType()

OGRwkbGeometryType OGRMultiCurve::getGeometryType ( ) const

overridevirtual

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.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

hasCurveGeometry()

OGRBoolean OGRMultiCurve::hasCurveGeometry ( int  bLookForNonLinear = FALSE ) const

overridevirtual

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 OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

isCompatibleSubType()

OGRBoolean OGRMultiCurve::isCompatibleSubType ( OGRwkbGeometryType  eSubType ) const

overrideprotectedvirtual

Returns whether a geometry of the specified geometry type can be a member of this collection.

Parameters

eSubType

type of the potential member

Returns

TRUE or FALSE

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

operator=()

OGRMultiCurve & OGRMultiCurve::operator=

(

const OGRMultiCurve &

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

---

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

• ogr_geometry.h
• ogrmulticurve.cpp