Set of tools to manage LandR elements. More...

#include <landr/LandRTools.hpp>

Public Types
enum	Relationship { NONE, INTERSECTS, CONTAINS, EQUALS, TOUCHES }

Static Public Member Functions
static geos::geom::LineString *	computeMergedLineStringFromGeometry (geos::geom::Geometry *Geom)
	Returns a geos::geom::LineString representing the linearized input geos::geom::Geometry. More...

static std::vector< geos::geom::LineString * > *	computeMergedLineStringsFromGeometry (geos::geom::Geometry *Geom)
	Returns a vector of geos::geom::LineString representing the linearized input geos::geom::Geometry. More...

static std::vector< geos::geom::LineString * >	computeVectorOfExteriorRings (openfluid::landr::VectorDataset &Val)
	Returns all exterior rings of the polygon-typed VectorDataset. More...

static std::vector< geos::geom::LineString * >	computeVectorOfLines (openfluid::landr::VectorDataset &Val)
	Returns all geos::geom::LineString composing of the linestring-typed VectorDataset. More...

static std::vector< geos::geom::LineString * > *	computeNodedLines (geos::geom::Geometry Geom1, geos::geom::Geometry Geom2, double SnapTolerance=0, double PrecisionReducer=10000000)
	Gets all full noded geos::geom::LineString from intersection between geom1 and geom2, with snap tolerance. More...

static geos::geom::Geometry *	computeSnapOverlayUnion (geos::geom::Geometry &Geom1, geos::geom::Geometry &Geom2, double SnapTolerance=0)
	Same as from geos::operation::overlay::snap::SnapOverlayOp::Union(), but with ability to use the wished snap tolerance value. More...

static bool	exists (geos::geom::LineString Line, std::list< geos::geom::LineString > RefLines, double Tolerance=0)
	Returns true if a geos::geom::LineString is exactly equals of an element of a list of geos::geom::LineString, up to a specified tolerance. More...

static void	polygonizeGeometry (std::vector< geos::geom::Geometry > &Lines, std::vector< geos::geom::Polygon > &Polygons, std::vector< const geos::geom::LineString *> &Dangles)
	Creates all possible geos::geom::Polygon from a geos::geom::Geometry. More...

static void	markVisitedNodesUsingDFS (geos::planargraph::Node *Node)
	Recursive depth first search algorithm in a LineStringGraph and mark visited Nodes. More...

static std::vector< geos::geom::Polygon * >	computeIntersectPolygons (geos::geom::Geometry Geom1, geos::geom::Geometry Geom2)
	Intersection of two geos::geom::Geometry of Polygons. More...

static std::vector< geos::geom::LineString * >	splitLineStringByPoint (geos::geom::LineString &Entity, geos::geom::Point &Point, double SnapTolerance)
	Splits a geos::geom::LineString by a geos::geom::Point. More...

static void	splitLineStringByPoints (geos::geom::LineString &Entity, std::vector< geos::geom::Point > &Points, double SnapTolerance, std::vector< geos::geom::LineString > &vLines, unsigned int step=0)
	Recursively split operation on a geos::geom::LineString by a vector of geos::geom::Point. More...

static std::vector< geos::geom::LineString * > *	cleanLineStrings (std::vector< geos::geom::LineString *> vLines, double SnapTolerance)
	Clean a vector of geos::geom::LineString (break at each intersection and remove duplicate geometry) More...

static std::vector< geos::geom::Point * >	computeNodesFromVectorOfLines (std::vector< geos::geom::LineString *> &NodedLines)
	Returns the nodes of a vector of geos::geom::LineString. More...

static void	markInvertedLineStringEntityUsingDFS (geos::planargraph::Node *Node, std::vector< int > &vectIdent)
	Returns the inverted openfluid::landr::LineStringEntity of a geos::planargraph using a recursive method. More...

static bool	isExtentsIntersect (std::vector< OGREnvelope > vEnvelope)
	Returns true if the OGREnvelope intersect, false otherwise. More...

Detailed Description

Set of tools to manage LandR elements.

Member Enumeration Documentation

◆ Relationship

enum openfluid::landr::LandRTools::Relationship

Enumerator
NONE
INTERSECTS
CONTAINS
EQUALS
TOUCHES

Member Function Documentation

◆ cleanLineStrings()

static std::vector<geos::geom::LineString> openfluid::landr::LandRTools::cleanLineStrings	(	std::vector< geos::geom::LineString *>	vLines,
		double	SnapTolerance
	)

static

Clean a vector of geos::geom::LineString (break at each intersection and remove duplicate geometry)

Parameters

vLines	An existent vector of geos::geom::LineString.
SnapTolerance	The tolerance to use.

Returns: a vector of geos::geom::LineString.

◆ computeIntersectPolygons()

static std::vector<geos::geom::Polygon*> openfluid::landr::LandRTools::computeIntersectPolygons	(	geos::geom::Geometry *	Geom1,
		geos::geom::Geometry *	Geom2
	)

static

Intersection of two geos::geom::Geometry of Polygons.

Parameters

Geom1	The geos::geom::Geometry to join with Geom2.
Geom2	The other geos::geom::Geometry.

Returns: A vector of geos::geom::Polygon representing the intersection of Geom1 and Geom2.

◆ computeMergedLineStringFromGeometry()

static geos::geom::LineString* openfluid::landr::LandRTools::computeMergedLineStringFromGeometry ( geos::geom::Geometry * Geom )

static

Returns a geos::geom::LineString representing the linearized input geos::geom::Geometry.

Parameters

Geom	The geos::geom::Geometry to linearize.

Returns: A new allocated geos::geom::LineString representing the linearized input geos::geom::Geometry, or 0 if the geos::geom::Geometry cannot be linearized into a single geos::geom::LineString.

◆ computeMergedLineStringsFromGeometry()

static std::vector<geos::geom::LineString*>* openfluid::landr::LandRTools::computeMergedLineStringsFromGeometry ( geos::geom::Geometry * Geom )

static

Returns a vector of geos::geom::LineString representing the linearized input geos::geom::Geometry.

Parameters

Geom	The geos::geom::Geometry to linearize.

Returns: A new allocated vector of geos::geom::LineString representing the maximal linearized input geos::geom::Geometry, or 0 if the geos::geom::Geometry is not "Line" typed.

◆ computeNodedLines()

static std::vector<geos::geom::LineString> openfluid::landr::LandRTools::computeNodedLines	(	geos::geom::Geometry *	Geom1,
		geos::geom::Geometry *	Geom2,
		double	SnapTolerance = `0`,
		double	PrecisionReducer = `10000000`
	)

static

Gets all full noded geos::geom::LineString from intersection between geom1 and geom2, with snap tolerance.

Parameters

Geom1	The geos::geom::Geometry to node with Geom2.
Geom2	The other geos::geom::Geometry.
SnapTolerance	The tolerance to use while computing intersections and equality of lines.
PrecisionReducer	The PrecisionModel value for reducing coordinates precision, default is 10000000 (7 digits).

Returns: A vector of geos::geom::LineString, representing all input lines, cut at each node.

◆ computeNodesFromVectorOfLines()

static std::vector<geos::geom::Point*> openfluid::landr::LandRTools::computeNodesFromVectorOfLines ( std::vector< geos::geom::LineString *> & NodedLines )

static

Returns the nodes of a vector of geos::geom::LineString.

Parameters

NodedLines A vector of geos::geom::LineString.

Returns: A vector of geos::geom::Point.

◆ computeSnapOverlayUnion()

static geos::geom::Geometry* openfluid::landr::LandRTools::computeSnapOverlayUnion	(	geos::geom::Geometry &	Geom1,
		geos::geom::Geometry &	Geom2,
		double	SnapTolerance = `0`
	)

static

Same as from geos::operation::overlay::snap::SnapOverlayOp::Union(), but with ability to use the wished snap tolerance value.

Parameters

Geom1	The geos::geom::Geometry to join with Geom2.
Geom2	The other geos::geom::Geometry.
SnapTolerance	The tolerance to use, default is 0.

Returns: A new geos::geom::Geometry representing the union of Geom1 and Geom2 according to SnapTolerance value.

◆ computeVectorOfExteriorRings()

static std::vector<geos::geom::LineString*> openfluid::landr::LandRTools::computeVectorOfExteriorRings ( openfluid::landr::VectorDataset & Val )

static

Returns all exterior rings of the polygon-typed VectorDataset.

Parameters

Val	A VectorDataset of polygons.

Returns: A vector of new allocated geos::geom::LineString representing exterior rings.

Exceptions

openfluid::base::FrameworkException if the VectorDataset is not polygon-typed.

◆ computeVectorOfLines()

static std::vector<geos::geom::LineString*> openfluid::landr::LandRTools::computeVectorOfLines ( openfluid::landr::VectorDataset & Val )

static

Returns all geos::geom::LineString composing of the linestring-typed VectorDataset.

Parameters

Val	A VectorDataset of linestrings.

Returns: A vector of new allocated geos::geom::Geometry representing lines.

Exceptions

base::FrameworkException if the VectorDataset is not linestring-typed.

◆ exists()

static bool openfluid::landr::LandRTools::exists	(	geos::geom::LineString *	Line,
		std::list< geos::geom::LineString *>	RefLines,
		double	Tolerance = `0`
	)

static

Returns true if a geos::geom::LineString is exactly equals of an element of a list of geos::geom::LineString, up to a specified tolerance.

Parameters

Line	The geos::geom::LineString to compare.
RefLines	The list of geos::geom::LineString to compare to.
Tolerance	The tolerance to use.

◆ isExtentsIntersect()

static bool openfluid::landr::LandRTools::isExtentsIntersect ( std::vector< OGREnvelope > vEnvelope )

static

Returns true if the OGREnvelope intersect, false otherwise.

◆ markInvertedLineStringEntityUsingDFS()

static void openfluid::landr::LandRTools::markInvertedLineStringEntityUsingDFS	(	geos::planargraph::Node *	Node,
		std::vector< int > &	vectIdent
	)

static

Returns the inverted openfluid::landr::LineStringEntity of a geos::planargraph using a recursive method.

Parameters

Node	A geos::planargraph::node of a geos::planargraph.
vectIdent	A vector which will contain the identifier of each inverted openfluid::landr::LinestringEntity.

◆ markVisitedNodesUsingDFS()

static void openfluid::landr::LandRTools::markVisitedNodesUsingDFS ( geos::planargraph::Node * Node )

static

Recursive depth first search algorithm in a LineStringGraph and mark visited Nodes.

Parameters

Node	the begin geos::planargraph::Node of LineStringGraph

◆ polygonizeGeometry()

static void openfluid::landr::LandRTools::polygonizeGeometry	(	std::vector< geos::geom::Geometry *> &	Lines,
		std::vector< geos::geom::Polygon *> &	Polygons,
		std::vector< const geos::geom::LineString *> &	Dangles
	)

static

Creates all possible geos::geom::Polygon from a geos::geom::Geometry.

Parameters

Lines	The input vector of geos::geom::Geometry to polygonize.
Polygons	The output vector of newly created geos::geom::Polygon.
Dangles	The output vector of dangle geos::geom::LineString.

◆ splitLineStringByPoint()

static std::vector<geos::geom::LineString*> openfluid::landr::LandRTools::splitLineStringByPoint	(	geos::geom::LineString &	Entity,
		geos::geom::Point &	Point,
		double	SnapTolerance
	)

static

Splits a geos::geom::LineString by a geos::geom::Point.

Parameters

Entity	An existent geos::geom::LineString.
Point	A geos::geom::Point.
SnapTolerance	The threshold distance used to find Point on Line.

Returns: a vector of geos::geom::LineString, or empty vector if splitting operation is null.

◆ splitLineStringByPoints()

static void openfluid::landr::LandRTools::splitLineStringByPoints	(	geos::geom::LineString &	Entity,
		std::vector< geos::geom::Point *> &	Points,
		double	SnapTolerance,
		std::vector< geos::geom::LineString *> &	vLines,
		unsigned int	step = `0`
	)

static

Recursively split operation on a geos::geom::LineString by a vector of geos::geom::Point.

Parameters

Entity	An existent geos::geom::LineString.
Points	A vector of geos::geom::Point.
SnapTolerance	The threshold distance used to find Point on Line.
vLines	the resulting vector of geos::geom::LineString splitted.
step	iterator of the vector of Point; default is 0.

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

landr/LandRTools.hpp

Public Types

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ Relationship

Member Function Documentation

◆ cleanLineStrings()

◆ computeIntersectPolygons()

◆ computeMergedLineStringFromGeometry()

◆ computeMergedLineStringsFromGeometry()

◆ computeNodedLines()

◆ computeNodesFromVectorOfLines()

◆ computeSnapOverlayUnion()

◆ computeVectorOfExteriorRings()

◆ computeVectorOfLines()

◆ exists()

◆ isExtentsIntersect()

◆ markInvertedLineStringEntityUsingDFS()

◆ markVisitedNodesUsingDFS()

◆ polygonizeGeometry()

◆ splitLineStringByPoint()

◆ splitLineStringByPoints()