Algorithm to subdivide polygons based on a cell tilling and merge them back to their original format. More...

#include <PolygonSubdivider.h>

Public Types
using	ClusterIndexes = std::vector< std::size_t >

using	Clusters = std::vector< ClusterIndexes >

using	GeometryAssociation = std::pair< std::size_t, std::size_t >

using	GeometryAssociations = std::vector< GeometryAssociation >

using	SetIndexes = std::set< std::size_t >

Static Public Member Functions
static GeometryAssociations	calculateGeometryAssociations (const std::vector< te::vp::SegmentInfo * > &vecBorderSegments, te::gm::Dimensionality dimensionality)
	Creates a non-normalized match map containing only the indexes of geometries that have a border relation to each other. This analysis is not recursive. More...

static GeometryAssociations	calculateGeometryAssociations (const te::gm::GeometryVector &vecFragments, const te::gm::LineString *splitLine)
	Creates a normalized match map containing only the indexes of geometries that have a border relation to each other. This analysis is recursive. More...

static Clusters	calculateGeometryClusters (const GeometryAssociations &geometryMatchMap)
	Normalizes an match map ensuring that all the list of indexes is complete, that is, the list will containg the indexes of all fragments that have borders with the key index. More...

static bool	checkForGeometrySubdivision (const te::gm::Envelope &currentTile, const te::gm::Geometry geometry, std::size_t geometryIndex, std::vector< te::vp::SegmentInfo > &vecSegmentsInBorder)

static te::gm::GeometryVector	dissolveFragments (const te::gm::GeometryVector &vecFragments, const Clusters &clusters)
	Dissolves all the geometries from the given fragments vector using the given match map as reference. More...

static bool	filterSegmentsInBorder (const te::gm::Geometry geometry, std::size_t geometryIndex, const te::gm::LineString splitLine, std::vector< te::vp::SegmentInfo * > &vecSegmentsInBorder)
	From the givem geometry, creates a list of all the segments that are exactly in the border of the given split reference line. It also returns the indexes of the geometries that doesnt overlap the given split reference line. More...

static std::vector< te::vp::SegmentInfo * >	filterSegmentsInBorder (const te::gm::GeometryVector &vecFragments, const te::gm::LineString *splitLine, std::vector< std::size_t > &vecIndexesNotInBorder)
	From the givem geometry vector, creates a list of all the segments that are exactly in the border of the given split reference line. It also returns the indexes of the geometries that doesnt overlap the given split reference line. More...

static SetIndexes	getUniqueIndexes (const GeometryAssociations &geometryAssociations)

static te::gm::GeometryVector	merge (const te::gm::GeometryVector &vecFragments, const SubdividerTilling &tilling)
	Dissolves all the geometries from the given fragments vector that have borders with the given split reference line. More...

static te::gm::GeometryVector	merge (const te::gm::GeometryVector &vecFragments, const te::gm::LineString *splitLine)
	Dissolves all the geometries from the given fragments vector that have borders with the given split reference line. More...

static te::gm::GeometryVector	subdivide (const te::gm::Geometry *geometry, const SubdividerTilling &tilling, std::size_t maxCoordinates)
	Subdivides the given geometry using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope. More...

static te::gm::GeometryVector	subdivide (const te::gm::Geometry *geometry, const te::gm::Envelope &envelope, std::size_t maxCoordinates)
	Subdivides the given geometry using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope. More...

static te::gm::GeometryVector	subdivide (const te::gm::Geometry *geometry, std::size_t maxCoordinates)
	Subdivides the given geometry using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope. More...

static te::gm::GeometryVector	subdivide (const te::gm::GeometryVector &vecInputGeometries, const SubdividerTilling &tilling, std::size_t maxCoordinates)
	Subdivides the given vecInputGeometries using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope. More...

static te::gm::GeometryVector	subdivide (const te::gm::GeometryVector &vecInputGeometries, const te::gm::Envelope &envelope, std::size_t maxCoordinates)

static te::gm::GeometryVector	subdivide (const te::gm::GeometryVector &vecInputGeometries, std::size_t maxCoordinates, std::vector< std::size_t > &vecParentIndexes)
	Subdivides the given vecInputGeometries using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope. More...

Detailed Description

Algorithm to subdivide polygons based on a cell tilling and merge them back to their original format.

Definition at line 61 of file PolygonSubdivider.h.

Member Typedef Documentation

◆ ClusterIndexes

using te::vp::PolygonSubdivider::ClusterIndexes = std::vector<std::size_t>

Definition at line 68 of file PolygonSubdivider.h.

◆ Clusters

using te::vp::PolygonSubdivider::Clusters = std::vector<ClusterIndexes>

Definition at line 69 of file PolygonSubdivider.h.

◆ GeometryAssociation

using te::vp::PolygonSubdivider::GeometryAssociation = std::pair<std::size_t, std::size_t>

Definition at line 66 of file PolygonSubdivider.h.

◆ GeometryAssociations

using te::vp::PolygonSubdivider::GeometryAssociations = std::vector<GeometryAssociation>

Definition at line 67 of file PolygonSubdivider.h.

◆ SetIndexes

using te::vp::PolygonSubdivider::SetIndexes = std::set<std::size_t>

Definition at line 65 of file PolygonSubdivider.h.

Member Function Documentation

◆ calculateGeometryAssociations() [1/2]

static GeometryAssociations te::vp::PolygonSubdivider::calculateGeometryAssociations	(	const std::vector< te::vp::SegmentInfo * > &	vecBorderSegments,
		te::gm::Dimensionality	dimensionality
	)

static

Creates a non-normalized match map containing only the indexes of geometries that have a border relation to each other. This analysis is not recursive.

Parameters

vecBorderSegments The vector containing the border segments to be analysed

Returns: The non-normalized match map containing only the indexes of geometries that have a border relation to each other

◆ calculateGeometryAssociations() [2/2]

static GeometryAssociations te::vp::PolygonSubdivider::calculateGeometryAssociations	(	const te::gm::GeometryVector &	vecFragments,
		const te::gm::LineString *	splitLine
	)

static

Creates a normalized match map containing only the indexes of geometries that have a border relation to each other. This analysis is recursive.

Parameters

vecFragments	The vector containing the geometry fragments to be analysed
splitLine	The referente split line where the geomtry fragments must be analysed

Returns: The normalized match map containing only the indexes of geometries that have a border relation to each other

◆ calculateGeometryClusters()

static Clusters te::vp::PolygonSubdivider::calculateGeometryClusters ( const GeometryAssociations & geometryMatchMap )

static

Normalizes an match map ensuring that all the list of indexes is complete, that is, the list will containg the indexes of all fragments that have borders with the key index.

Parameters

geometryMatchMap The match map to be normalized

◆ checkForGeometrySubdivision()

static bool te::vp::PolygonSubdivider::checkForGeometrySubdivision	(	const te::gm::Envelope &	currentTile,
		const te::gm::Geometry *	geometry,
		std::size_t	geometryIndex,
		std::vector< te::vp::SegmentInfo * > &	vecSegmentsInBorder
	)

static

◆ dissolveFragments()

static te::gm::GeometryVector te::vp::PolygonSubdivider::dissolveFragments	(	const te::gm::GeometryVector &	vecFragments,
		const Clusters &	clusters
	)

static

Dissolves all the geometries from the given fragments vector using the given match map as reference.

Parameters

vecFragments	A vector containing all the candidate fragments to be dissolved
geometryMatchMap	The match map to be be used as reference

Returns: The geometry vector containing the dissolved geometries

◆ filterSegmentsInBorder() [1/2]

static bool te::vp::PolygonSubdivider::filterSegmentsInBorder	(	const te::gm::Geometry *	geometry,
		std::size_t	geometryIndex,
		const te::gm::LineString *	splitLine,
		std::vector< te::vp::SegmentInfo * > &	vecSegmentsInBorder
	)

static

From the givem geometry, creates a list of all the segments that are exactly in the border of the given split reference line. It also returns the indexes of the geometries that doesnt overlap the given split reference line.

Parameters

geometry	The geometry to be analysed
geometryIndex	The index of the geometry
splitLine	The referente split line where the geomtry fragments must be analysed
vecSegmentsInBorder	(Return parameter) A vector containing all the segments in the border of the given split reference line. f the vector is empty, the given geometry does not share borders with the given split line

Returns: TRUE if at least one segment is in the border.

◆ filterSegmentsInBorder() [2/2]

static std::vector<te::vp::SegmentInfo*> te::vp::PolygonSubdivider::filterSegmentsInBorder	(	const te::gm::GeometryVector &	vecFragments,
		const te::gm::LineString *	splitLine,
		std::vector< std::size_t > &	vecIndexesNotInBorder
	)

static

From the givem geometry vector, creates a list of all the segments that are exactly in the border of the given split reference line. It also returns the indexes of the geometries that doesnt overlap the given split reference line.

Parameters

vecFragments	The vector containing the geometry fragments to be analysed
splitLine	The referente split line where the geomtry fragments must be analysed
vecIndexesNotInBorder	(Return parameter) A return value containing the indexes of the geometries that doesnt overlap the given split reference line

Returns: A vector containing all the segments in the border of the given split reference line

◆ getUniqueIndexes()

static SetIndexes te::vp::PolygonSubdivider::getUniqueIndexes ( const GeometryAssociations & geometryAssociations )

static

◆ merge() [1/2]

static te::gm::GeometryVector te::vp::PolygonSubdivider::merge	(	const te::gm::GeometryVector &	vecFragments,
		const SubdividerTilling &	tilling
	)

static

Dissolves all the geometries from the given fragments vector that have borders with the given split reference line.

Parameters

vecFragments	A vector containing all the candidate fragments to be dissolved
splitLine	The split reference line

Returns: The geometry vector containing the dissolved geometries

◆ merge() [2/2]

static te::gm::GeometryVector te::vp::PolygonSubdivider::merge	(	const te::gm::GeometryVector &	vecFragments,
		const te::gm::LineString *	splitLine
	)

static

Dissolves all the geometries from the given fragments vector that have borders with the given split reference line.

Parameters

vecFragments	A vector containing all the candidate fragments to be dissolved
splitLine	The split reference line

Returns: The geometry vector containing the dissolved geometries

◆ subdivide() [1/6]

static te::gm::GeometryVector te::vp::PolygonSubdivider::subdivide	(	const te::gm::Geometry *	geometry,
		const SubdividerTilling &	tilling,
		std::size_t	maxCoordinates
	)

static

Subdivides the given geometry using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope.

Parameters

geometry	The input geometry to be clipped
envelope	The envelope to be used as clipping area

Returns: A geometry vector containing the clipping result

◆ subdivide() [2/6]

static te::gm::GeometryVector te::vp::PolygonSubdivider::subdivide	(	const te::gm::Geometry *	geometry,
		const te::gm::Envelope &	envelope,
		std::size_t	maxCoordinates
	)

static

Subdivides the given geometry using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope.

Parameters

geometry	The input geometry to be clipped
envelope	The envelope to be used as clipping area

Returns: A geometry vector containing the clipping result

◆ subdivide() [3/6]

static te::gm::GeometryVector te::vp::PolygonSubdivider::subdivide	(	const te::gm::Geometry *	geometry,
		std::size_t	maxCoordinates
	)

static

Subdivides the given geometry using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope.

Parameters

geometry	The input geometry to be clipped
envelope	The envelope to be used as clipping area

Returns: A geometry vector containing the clipping result

◆ subdivide() [4/6]

static te::gm::GeometryVector te::vp::PolygonSubdivider::subdivide	(	const te::gm::GeometryVector &	vecInputGeometries,
		const SubdividerTilling &	tilling,
		std::size_t	maxCoordinates
	)

static

Subdivides the given vecInputGeometries using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope.

Parameters

vecInputGeometries	The input geometries to be clipped
envelope	The envelope to be used as clipping area

Returns: A geometry vector containing the clipping result

◆ subdivide() [5/6]

static te::gm::GeometryVector te::vp::PolygonSubdivider::subdivide	(	const te::gm::GeometryVector &	vecInputGeometries,
		const te::gm::Envelope &	envelope,
		std::size_t	maxCoordinates
	)

static

◆ subdivide() [6/6]

static te::gm::GeometryVector te::vp::PolygonSubdivider::subdivide	(	const te::gm::GeometryVector &	vecInputGeometries,
		std::size_t	maxCoordinates,
		std::vector< std::size_t > &	vecParentIndexes
	)

static

Subdivides the given vecInputGeometries using the given envelope. This has the same result as an intersection operation, but uses an optimized algorithm which considers an envelope.

Parameters

vecInputGeometries	The input geometries to be clipped
envelope	The envelope to be used as clipping area

Returns: A geometry vector containing the clipping result

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

/home/castejon/castejon_files/develop/terralib5/git_release/src/terralib/vp/PolygonSubdivider.h

Public Types

Static Public Member Functions

Detailed Description

Member Typedef Documentation

◆ ClusterIndexes

◆ Clusters

◆ GeometryAssociation

◆ GeometryAssociations

◆ SetIndexes

Member Function Documentation

◆ calculateGeometryAssociations() [1/2]

◆ calculateGeometryAssociations() [2/2]

◆ calculateGeometryClusters()

◆ checkForGeometrySubdivision()

◆ dissolveFragments()

◆ filterSegmentsInBorder() [1/2]

◆ filterSegmentsInBorder() [2/2]

◆ getUniqueIndexes()

◆ merge() [1/2]

◆ merge() [2/2]

◆ subdivide() [1/6]

◆ subdivide() [2/6]

◆ subdivide() [3/6]

◆ subdivide() [4/6]

◆ subdivide() [5/6]

◆ subdivide() [6/6]