#include <qgsgeometry.h>

Classes
class	Error

Public Member Functions
	QgsGeometry ()
	Constructor.
	QgsGeometry (const QgsGeometry &)
	copy constructor will prompt a deep copy of the object
QgsGeometry &	operator= (QgsGeometry const &rhs)
	assignments will prompt a deep copy of the object
	~QgsGeometry ()
	Destructor.
void	fromGeos (GEOSGeometry *geos)
	Set the geometry, feeding in a geometry in GEOS format.
void	fromWkb (unsigned char *wkb, size_t length)
	Set the geometry, feeding in the buffer containing OGC Well-Known Binary and the buffer's length.
const unsigned char *	asWkb () const
	Returns the buffer containing this geometry in WKB format.
size_t	wkbSize () const
	Returns the size of the WKB in asWkb().
const GEOSGeometry *	asGeos () const
	Returns a geos geomtry.
QGis::WkbType	wkbType () const
	Returns type of wkb (point / linestring / polygon etc.)
QGis::GeometryType	type ()
	Returns type of the vector.
bool	isMultipart ()
	Returns true if wkb of the geometry is of WKBMulti* type.
bool	isGeosEqual (QgsGeometry &)
	compare geometries using GEOS
bool	isGeosValid ()
	check validity using GEOS
bool	isGeosEmpty ()
	check if geometry is empty using GEOS
double	area ()
	get area of geometry using GEOS
double	length ()
	get length of geometry using GEOS
double	distance (QgsGeometry &geom)
QgsPoint	closestVertex (const QgsPoint &point, int &atVertex, int &beforeVertex, int &afterVertex, double &sqrDist)
	Returns the vertex closest to the given point, the corresponding vertex index, squared distance snap point / target point and the indices of the vertices before/after.
void	adjacentVertices (int atVertex, int &beforeVertex, int &afterVertex)
	Returns the indexes of the vertices before and after the given vertex index.
bool	insertVertex (double x, double y, int beforeVertex)
	Insert a new vertex before the given vertex index, ring and item (first number is index 0) If the requested vertex number (beforeVertex.back()) is greater than the last actual vertex on the requested ring and item, it is assumed that the vertex is to be appended instead of inserted.
bool	moveVertex (double x, double y, int atVertex)
	Moves the vertex at the given position number and item (first number is index 0) to the given coordinates.
bool	deleteVertex (int atVertex)
	Deletes the vertex at the given position number and item (first number is index 0) Returns false if atVertex does not correspond to a valid vertex on this geometry (including if this geometry is a Point), or if the number of remaining verticies in the linestring would be less than two.
QgsPoint	vertexAt (int atVertex)
	Returns coordinates of a vertex.
double	sqrDistToVertexAt (QgsPoint &point, int atVertex)
	Returns the squared cartesian distance between the given point to the given vertex index (vertex at the given position number, ring and item (first number is index 0))
double	closestVertexWithContext (const QgsPoint &point, int &atVertex)
	Searches for the closest vertex in this geometry to the given point.
double	closestSegmentWithContext (const QgsPoint &point, QgsPoint &minDistPoint, int &afterVertex, double *leftOf=0, double epsilon=DEFAULT_SEGMENT_EPSILON)
	Searches for the closest segment of geometry to the given point.
int	addRing (const QList< QgsPoint > &ring)
	Adds a new ring to this geometry.
int	addPart (const QList< QgsPoint > &points, QGis::GeometryType geomType=QGis::UnknownGeometry)
	Adds a new island polygon to a multipolygon feature.
int	addPart (GEOSGeometry *newPart)
	Adds a new island polygon to a multipolygon feature.
int	addPart (QgsGeometry *newPart)
	Adds a new island polygon to a multipolygon feature.
int	translate (double dx, double dy)
	Translate this geometry by dx, dy.
int	transform (const QgsCoordinateTransform &ct)
	Transform this geometry as described by CoordinateTranasform ct.
int	splitGeometry (const QList< QgsPoint > &splitLine, QList< QgsGeometry * > &newGeometries, bool topological, QList< QgsPoint > &topologyTestPoints)
	Splits this geometry according to a given line.
int	reshapeGeometry (const QList< QgsPoint > &reshapeWithLine)
	Replaces a part of this geometry with another line.
int	makeDifference (QgsGeometry *other)
	Changes this geometry such that it does not intersect the other geometry.
QgsRectangle	boundingBox ()
	Returns the bounding box of this feature.
bool	intersects (const QgsRectangle &r) const
	Test for intersection with a rectangle (uses GEOS)
bool	intersects (const QgsGeometry *geometry) const
	Test for intersection with a geometry (uses GEOS)
bool	contains (const QgsPoint *p) const
	Test for containment of a point (uses GEOS)
bool	contains (const QgsGeometry *geometry) const
	Test for if geometry is contained in another (uses GEOS)
bool	disjoint (const QgsGeometry *geometry) const
	Test for if geometry is disjoint of another (uses GEOS)
bool	equals (const QgsGeometry *geometry) const
	Test for if geometry equals another (uses GEOS)
bool	touches (const QgsGeometry *geometry) const
	Test for if geometry touch another (uses GEOS)
bool	overlaps (const QgsGeometry *geometry) const
	Test for if geometry overlaps another (uses GEOS)
bool	within (const QgsGeometry *geometry) const
	Test for if geometry is within another (uses GEOS)
bool	crosses (const QgsGeometry *geometry) const
	Test for if geometry crosses another (uses GEOS)
QgsGeometry *	buffer (double distance, int segments)
	Returns a buffer region around this geometry having the given width and with a specified number of segments used to approximate curves.
QgsGeometry *	buffer (double distance, int segments, int endCapStyle, int joinStyle, double mitreLimit)
	Returns a buffer region around the geometry, with additional style options.
QgsGeometry *	offsetCurve (double distance, int segments, int joinStyle, double mitreLimit)
	Returns an offset line at a given distance and side from an input line.
QgsGeometry *	simplify (double tolerance)
	Returns a simplified version of this geometry using a specified tolerance value.
QgsGeometry *	centroid ()
	Returns the center of mass of a geometry.
QgsGeometry *	pointOnSurface ()
	Returns a point within a geometry.
QgsGeometry *	convexHull ()
	Returns the smallest convex polygon that contains all the points in the geometry.
QgsGeometry *	interpolate (double distance)
QgsGeometry *	intersection (QgsGeometry *geometry)
	Returns a geometry representing the points shared by this geometry and other.
QgsGeometry *	combine (QgsGeometry *geometry)
	Returns a geometry representing all the points in this geometry and other (a union geometry operation).
QgsGeometry *	difference (QgsGeometry *geometry)
	Returns a geometry representing the points making up this geometry that do not make up other.
QgsGeometry *	symDifference (QgsGeometry *geometry)
	Returns a Geometry representing the points making up this Geometry that do not make up other.
QString	exportToWkt (const int &precision=17) const
	Exports the geometry to WKT.
QString	exportToGeoJSON (const int &precision=17) const
	Exports the geometry to GeoJSON.
QgsGeometry *	convertToType (QGis::GeometryType destType, bool destMultipart=false)
	try to convert the geometry to the requested type
QgsPoint	asPoint () const
	return contents of the geometry as a point if wkbType is WKBPoint, otherwise returns [0,0]
QgsPolyline	asPolyline () const
	return contents of the geometry as a polyline if wkbType is WKBLineString, otherwise an empty list
QgsPolygon	asPolygon () const
	return contents of the geometry as a polygon if wkbType is WKBPolygon, otherwise an empty list
QgsMultiPoint	asMultiPoint () const
	return contents of the geometry as a multi point if wkbType is WKBMultiPoint, otherwise an empty list
QgsMultiPolyline	asMultiPolyline () const
	return contents of the geometry as a multi linestring if wkbType is WKBMultiLineString, otherwise an empty list
QgsMultiPolygon	asMultiPolygon () const
	return contents of the geometry as a multi polygon if wkbType is WKBMultiPolygon, otherwise an empty list
QList< QgsGeometry * >	asGeometryCollection () const
	return contents of the geometry as a list of geometries
bool	deleteRing (int ringNum, int partNum=0)
	delete a ring in polygon or multipolygon.
bool	deletePart (int partNum)
	delete part identified by the part number
bool	convertToMultiType ()
	Converts single type geometry into multitype geometry e.g.
int	avoidIntersections (QMap< QgsVectorLayer , QSet< QgsFeatureId > > ignoreFeatures=(QMap< QgsVectorLayer , QSet< QgsFeatureId > >()))
	Modifies geometry to avoid intersections with the layers specified in project properties.
void	validateGeometry (QList< Error > &errors)
	Validate geometry and produce a list of geometry errors.

Static Public Member Functions
static GEOSContextHandle_t	getGEOSHandler ()
	return GEOS context handle
static QgsGeometry *	fromWkt (QString wkt)
	static method that creates geometry from Wkt
static QgsGeometry *	fromPoint (const QgsPoint &point)
	construct geometry from a point
static QgsGeometry *	fromMultiPoint (const QgsMultiPoint &multipoint)
	construct geometry from a multipoint
static QgsGeometry *	fromPolyline (const QgsPolyline &polyline)
	construct geometry from a polyline
static QgsGeometry *	fromMultiPolyline (const QgsMultiPolyline &multiline)
	construct geometry from a multipolyline
static QgsGeometry *	fromPolygon (const QgsPolygon &polygon)
	construct geometry from a polygon
static QgsGeometry *	fromMultiPolygon (const QgsMultiPolygon &multipoly)
	construct geometry from a multipolygon
static QgsGeometry *	fromRect (const QgsRectangle &rect)
	construct geometry from a rectangle
static QgsGeometry *	unaryUnion (const QList< QgsGeometry * > &geometryList)
	compute the unary union on a list of geometries.

Constructor & Destructor Documentation

QgsGeometry::QgsGeometry ( )

Constructor.

QgsGeometry::QgsGeometry ( const QgsGeometry & rhs )

copy constructor will prompt a deep copy of the object

QgsGeometry::~QgsGeometry ( )

Destructor.

Member Function Documentation

int QgsGeometry::addPart	(	const QList< QgsPoint > &	points,
		QGis::GeometryType	geomType = `QGis::UnknownGeometry`
	)

Adds a new island polygon to a multipolygon feature.

Returns: 0 in case of success, 1 if not a multipolygon, 2 if ring is not a valid geometry, 3 if new polygon ring not disjoint with existing polygons of the feature

int QgsGeometry::addPart ( GEOSGeometry * newPart )

Adds a new island polygon to a multipolygon feature.

Returns: 0 in case of success, 1 if not a multipolygon, 2 if ring is not a valid geometry, 3 if new polygon ring not disjoint with existing polygons of the feature

Note: not available in python bindings

int QgsGeometry::addPart ( QgsGeometry * newPart )

Adds a new island polygon to a multipolygon feature.

Returns: 0 in case of success, 1 if not a multipolygon, 2 if ring is not a valid geometry, 3 if new polygon ring not disjoint with existing polygons of the feature

Note: available in python bindings as addPartGeometry (added in 2.2)

int QgsGeometry::addRing ( const QList< QgsPoint > & ring )

Adds a new ring to this geometry.

This makes only sense for polygon and multipolygons.

Returns: 0 in case of success (ring added), 1 problem with geometry type, 2 ring not closed, 3 ring is not valid geometry, 4 ring not disjoint with existing rings, 5 no polygon found which contained the ring

void QgsGeometry::adjacentVertices	(	int	atVertex,
		int &	beforeVertex,
		int &	afterVertex
	)

Returns the indexes of the vertices before and after the given vertex index.

This function takes into account the following factors:

If the given vertex index is at the end of a linestring, the adjacent index will be -1 (for "no adjacent vertex")
If the given vertex index is at the end of a linear ring (such as in a polygon), the adjacent index will take into account the first vertex is equal to the last vertex (and will skip equal vertex positions).

double QgsGeometry::area ( )

get area of geometry using GEOS

QList< QgsGeometry * > QgsGeometry::asGeometryCollection ( ) const

return contents of the geometry as a list of geometries

const GEOSGeometry * QgsGeometry::asGeos ( ) const

Returns a geos geomtry.

QgsGeometry keeps ownership, don't delete the returned object!

Note: not available in python bindings

QgsMultiPoint QgsGeometry::asMultiPoint ( ) const

return contents of the geometry as a multi point if wkbType is WKBMultiPoint, otherwise an empty list

QgsMultiPolygon QgsGeometry::asMultiPolygon ( ) const

return contents of the geometry as a multi polygon if wkbType is WKBMultiPolygon, otherwise an empty list

QgsMultiPolyline QgsGeometry::asMultiPolyline ( ) const

return contents of the geometry as a multi linestring if wkbType is WKBMultiLineString, otherwise an empty list

QgsPoint QgsGeometry::asPoint ( ) const

return contents of the geometry as a point if wkbType is WKBPoint, otherwise returns [0,0]

QgsPolygon QgsGeometry::asPolygon ( ) const

return contents of the geometry as a polygon if wkbType is WKBPolygon, otherwise an empty list

QgsPolyline QgsGeometry::asPolyline ( ) const

return contents of the geometry as a polyline if wkbType is WKBLineString, otherwise an empty list

const unsigned char * QgsGeometry::asWkb ( ) const

Returns the buffer containing this geometry in WKB format.

You may wish to use in conjunction with wkbSize().

int QgsGeometry::avoidIntersections ( QMap< QgsVectorLayer *, QSet< QgsFeatureId > > ignoreFeatures = ( QMap<QgsVectorLayer*, QSet<QgsFeatureId> >() ) )

Modifies geometry to avoid intersections with the layers specified in project properties.

Returns: 0 in case of success, 1 if geometry is not of polygon type, 2 if avoid intersection would change the geometry type, 3 other error during intersection removal

Parameters

ignoreFeatures possibility to give a list of features where intersections should be ignored (not available in python bindings)

QgsRectangle QgsGeometry::boundingBox ( )

Returns the bounding box of this feature.

QgsGeometry * QgsGeometry::buffer	(	double	distance,
		int	segments
	)

Returns a buffer region around this geometry having the given width and with a specified number of segments used to approximate curves.

QgsGeometry * QgsGeometry::buffer	(	double	distance,
		int	segments,
		int	endCapStyle,
		int	joinStyle,
		double	mitreLimit
	)

Returns a buffer region around the geometry, with additional style options.

Parameters

distance	buffer distance
segments	For round joins, number of segments to approximate quarter-circle
endCapStyle	Round (1) / Flat (2) / Square (3) end cap style
joinStyle	Round (1) / Mitre (2) / Bevel (3) join style
mitreLimit	Limit on the mitre ratio used for very sharp corners

Note: added in 2.4; needs GEOS >= 3.3 - otherwise always returns 0

QgsGeometry * QgsGeometry::centroid ( )

Returns the center of mass of a geometry.

Note: for line based geometries, the center point of the line is returned, and for point based geometries, the point itself is returned

double QgsGeometry::closestSegmentWithContext	(	const QgsPoint &	point,
		QgsPoint &	minDistPoint,
		int &	afterVertex,
		double *	leftOf = `0`,
		double	epsilon = `DEFAULT_SEGMENT_EPSILON`
	)

Searches for the closest segment of geometry to the given point.

Parameters

point	Specifies the point for search
minDistPoint	Receives the nearest point on the segment
afterVertex	Receives index of the vertex after the closest segment. The vertex before the closest segment is always afterVertex - 1
leftOf	Out: Returns if the point lies on the left of right side of the segment ( < 0 means left, > 0 means right )
epsilon	epsilon for segment snapping

Returns: The squared cartesian distance is also returned in sqrDist, negative number on error

QgsPoint QgsGeometry::closestVertex	(	const QgsPoint &	point,
		int &	atVertex,
		int &	beforeVertex,
		int &	afterVertex,
		double &	sqrDist
	)

Returns the vertex closest to the given point, the corresponding vertex index, squared distance snap point / target point and the indices of the vertices before/after.

The vertices before/after are -1 if not present

double QgsGeometry::closestVertexWithContext	(	const QgsPoint &	point,
		int &	atVertex
	)

Searches for the closest vertex in this geometry to the given point.

Parameters

point	Specifiest the point for search
atVertex	Receives index of the closest vertex

Returns: The squared cartesian distance is also returned in sqrDist, negative number on error

QgsGeometry * QgsGeometry::combine ( QgsGeometry * geometry )

Returns a geometry representing all the points in this geometry and other (a union geometry operation).

Note: this operation is not called union since its a reserved word in C++.

bool QgsGeometry::contains ( const QgsPoint * p ) const

Test for containment of a point (uses GEOS)

bool QgsGeometry::contains ( const QgsGeometry * geometry ) const

Test for if geometry is contained in another (uses GEOS)

bool QgsGeometry::convertToMultiType ( )

Converts single type geometry into multitype geometry e.g.

a polygon into a multipolygon geometry with one polygon

Returns: true in case of success and false else

QgsGeometry * QgsGeometry::convertToType	(	QGis::GeometryType	destType,
		bool	destMultipart = `false`
	)

try to convert the geometry to the requested type

Parameters

destType	the geometry type to be converted to
destMultipart	determines if the output geometry will be multipart or not

Returns: the converted geometry or NULL pointer if the conversion fails.

Note: added in 2.2

QgsGeometry * QgsGeometry::convexHull ( )

Returns the smallest convex polygon that contains all the points in the geometry.

bool QgsGeometry::crosses ( const QgsGeometry * geometry ) const

Test for if geometry crosses another (uses GEOS)

bool QgsGeometry::deletePart ( int partNum )

delete part identified by the part number

Returns: true on success

bool QgsGeometry::deleteRing	(	int	ringNum,
		int	partNum = `0`
	)

delete a ring in polygon or multipolygon.

Ring 0 is outer ring and can't be deleted.

Returns: true on success

bool QgsGeometry::deleteVertex ( int atVertex )

Deletes the vertex at the given position number and item (first number is index 0) Returns false if atVertex does not correspond to a valid vertex on this geometry (including if this geometry is a Point), or if the number of remaining verticies in the linestring would be less than two.

It is up to the caller to distinguish between these error conditions. (Or maybe we add another method to this object to help make the distinction?)

QgsGeometry * QgsGeometry::difference ( QgsGeometry * geometry )

Returns a geometry representing the points making up this geometry that do not make up other.

bool QgsGeometry::disjoint ( const QgsGeometry * geometry ) const

Test for if geometry is disjoint of another (uses GEOS)

double QgsGeometry::distance ( QgsGeometry & geom )

bool QgsGeometry::equals ( const QgsGeometry * geometry ) const

Test for if geometry equals another (uses GEOS)

QString QgsGeometry::exportToGeoJSON ( const int & precision = 17 ) const

Exports the geometry to GeoJSON.

Returns: a QString representing the geometry as GeoJSON

Note: precision parameter added in 2.4

QString QgsGeometry::exportToWkt ( const int & precision = 17 ) const

Exports the geometry to WKT.

Note: precision parameter added in 2.4

Returns: true in case of success and false else

void QgsGeometry::fromGeos ( GEOSGeometry * geos )

Set the geometry, feeding in a geometry in GEOS format.

This class will take ownership of the buffer.

Note: not available in python bindings

QgsGeometry * QgsGeometry::fromMultiPoint ( const QgsMultiPoint & multipoint )

static

construct geometry from a multipoint

QgsGeometry * QgsGeometry::fromMultiPolygon ( const QgsMultiPolygon & multipoly )

static

construct geometry from a multipolygon

QgsGeometry * QgsGeometry::fromMultiPolyline ( const QgsMultiPolyline & multiline )

static

construct geometry from a multipolyline

QgsGeometry * QgsGeometry::fromPoint ( const QgsPoint & point )

static

construct geometry from a point

QgsGeometry * QgsGeometry::fromPolygon ( const QgsPolygon & polygon )

static

construct geometry from a polygon

QgsGeometry * QgsGeometry::fromPolyline ( const QgsPolyline & polyline )

static

construct geometry from a polyline

QgsGeometry * QgsGeometry::fromRect ( const QgsRectangle & rect )

static

construct geometry from a rectangle

void QgsGeometry::fromWkb	(	unsigned char *	wkb,
		size_t	length
	)

Set the geometry, feeding in the buffer containing OGC Well-Known Binary and the buffer's length.

This class will take ownership of the buffer.

QgsGeometry * QgsGeometry::fromWkt ( QString wkt )

static

static method that creates geometry from Wkt

GEOSContextHandle_t QgsGeometry::getGEOSHandler ( )

static

return GEOS context handle

Note: added in 2.6; not available in Python

bool QgsGeometry::insertVertex	(	double	x,
		double	y,
		int	beforeVertex
	)

Insert a new vertex before the given vertex index, ring and item (first number is index 0) If the requested vertex number (beforeVertex.back()) is greater than the last actual vertex on the requested ring and item, it is assumed that the vertex is to be appended instead of inserted.

Returns false if atVertex does not correspond to a valid vertex on this geometry (including if this geometry is a Point). It is up to the caller to distinguish between these error conditions. (Or maybe we add another method to this object to help make the distinction?)

QgsGeometry * QgsGeometry::interpolate ( double distance )

QgsGeometry * QgsGeometry::intersection ( QgsGeometry * geometry )

Returns a geometry representing the points shared by this geometry and other.

bool QgsGeometry::intersects ( const QgsRectangle & r ) const

Test for intersection with a rectangle (uses GEOS)

bool QgsGeometry::intersects ( const QgsGeometry * geometry ) const

Test for intersection with a geometry (uses GEOS)

bool QgsGeometry::isGeosEmpty ( )

check if geometry is empty using GEOS

bool QgsGeometry::isGeosEqual ( QgsGeometry & g )

compare geometries using GEOS

bool QgsGeometry::isGeosValid ( )

check validity using GEOS

bool QgsGeometry::isMultipart ( )

Returns true if wkb of the geometry is of WKBMulti* type.

double QgsGeometry::length ( )

get length of geometry using GEOS

int QgsGeometry::makeDifference ( QgsGeometry * other )

Changes this geometry such that it does not intersect the other geometry.

Parameters

other geometry that should not be intersect

Returns: 0 in case of success

bool QgsGeometry::moveVertex	(	double	x,
		double	y,
		int	atVertex
	)

Moves the vertex at the given position number and item (first number is index 0) to the given coordinates.

Returns false if atVertex does not correspond to a valid vertex on this geometry

QgsGeometry * QgsGeometry::offsetCurve	(	double	distance,
		int	segments,
		int	joinStyle,
		double	mitreLimit
	)

Returns an offset line at a given distance and side from an input line.

See buffer() method for details on parameters.

Note: added in 2.4; needs GEOS >= 3.3 - otherwise always returns 0

QgsGeometry & QgsGeometry::operator= ( QgsGeometry const & rhs )

assignments will prompt a deep copy of the object

Note: not available in python bindings

bool QgsGeometry::overlaps ( const QgsGeometry * geometry ) const

Test for if geometry overlaps another (uses GEOS)

QgsGeometry * QgsGeometry::pointOnSurface ( )

Returns a point within a geometry.

int QgsGeometry::reshapeGeometry ( const QList< QgsPoint > & reshapeWithLine )

Replaces a part of this geometry with another line.

Returns: 0 in case of success

QgsGeometry * QgsGeometry::simplify ( double tolerance )

Returns a simplified version of this geometry using a specified tolerance value.

int QgsGeometry::splitGeometry	(	const QList< QgsPoint > &	splitLine,
		QList< QgsGeometry * > &	newGeometries,
		bool	topological,
		QList< QgsPoint > &	topologyTestPoints
	)

Splits this geometry according to a given line.

Note that the geometry is only split once. If there are several intersections between geometry and splitLine, only the first one is considered.

Parameters

	splitLine	the line that splits the geometry
[out]	newGeometries	list of new geometries that have been created with the split
	topological	true if topological editing is enabled
[out]	topologyTestPoints	points that need to be tested for topological completeness in the dataset

Returns: 0 in case of success, 1 if geometry has not been split, error else

double QgsGeometry::sqrDistToVertexAt	(	QgsPoint &	point,
		int	atVertex
	)

Returns the squared cartesian distance between the given point to the given vertex index (vertex at the given position number, ring and item (first number is index 0))

QgsGeometry * QgsGeometry::symDifference ( QgsGeometry * geometry )

Returns a Geometry representing the points making up this Geometry that do not make up other.

bool QgsGeometry::touches ( const QgsGeometry * geometry ) const

Test for if geometry touch another (uses GEOS)

int QgsGeometry::transform ( const QgsCoordinateTransform & ct )

Transform this geometry as described by CoordinateTranasform ct.

Returns: 0 in case of success

int QgsGeometry::translate	(	double	dx,
		double	dy
	)

Translate this geometry by dx, dy.

Returns: 0 in case of success

QGis::GeometryType QgsGeometry::type ( )

Returns type of the vector.

QgsGeometry * QgsGeometry::unaryUnion ( const QList< QgsGeometry * > & geometryList )

static

compute the unary union on a list of geometries.

May be faster than an iterative union on a set of geometries.

Parameters

geometryList a list of QgsGeometry* as input

Returns: the new computed QgsGeometry, or null

void QgsGeometry::validateGeometry ( QList< Error > & errors )

Validate geometry and produce a list of geometry errors.

QgsPoint QgsGeometry::vertexAt ( int atVertex )

Returns coordinates of a vertex.

Parameters

atVertex index of the vertex

Returns: Coordinates of the vertex or QgsPoint(0,0) on error

bool QgsGeometry::within ( const QgsGeometry * geometry ) const

Test for if geometry is within another (uses GEOS)

size_t QgsGeometry::wkbSize ( ) const

Returns the size of the WKB in asWkb().

QGis::WkbType QgsGeometry::wkbType ( ) const

Returns type of wkb (point / linestring / polygon etc.)

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

/tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsgeometry.h
/tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsgeometry.cpp

Classes

Public Member Functions

Static Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation