geos::operation::BoundaryOp Class Reference

#include <BoundaryOp.h>

Public Member Functions
	BoundaryOp (const geom::Geometry &geom)
	BoundaryOp (const geom::Geometry &geom, const algorithm::BoundaryNodeRule &bnRule)
std::unique_ptr< geom::Geometry >	getBoundary ()

Static Public Member Functions
static std::unique_ptr< geom::Geometry >	getBoundary (const geom::Geometry &g)
static std::unique_ptr< geom::Geometry >	getBoundary (const geom::Geometry &g, const algorithm::BoundaryNodeRule &bnRule)
static bool	hasBoundary (const geom::Geometry &geom, const algorithm::BoundaryNodeRule &boundaryNodeRule)

Detailed Description

Computes the boundary of a Geometry. Allows specifying the BoundaryNodeRule to be used. This operation will always return a Geometry of the appropriate dimension for the boundary (even if the input geometry is empty). The boundary of zero-dimensional geometries (Points) is always the empty GeometryCollection.

Author

Martin Davis

Version

1.7

Constructor & Destructor Documentation

BoundaryOp() [1/2]

geos::operation::BoundaryOp::BoundaryOp

(

const geom::Geometry &

geom

)

Creates a new instance for the given geometry.

Parameters

geom	the input geometry

BoundaryOp() [2/2]

geos::operation::BoundaryOp::BoundaryOp	(	const geom::Geometry &	geom,
		const algorithm::BoundaryNodeRule &	bnRule
	)

Creates a new instance for the given geometry.

Parameters

geom	the input geometry
bnRule	the Boundary Node Rule to use

Member Function Documentation

getBoundary() [1/3]

std::unique_ptr< geom::Geometry > geos::operation::BoundaryOp::getBoundary

(

)

Gets the computed boundary.

Returns

the boundary geometry

getBoundary() [2/3]

static std::unique_ptr< geom::Geometry > geos::operation::BoundaryOp::getBoundary ( const geom::Geometry &  g )

static

Computes a geometry representing the boundary of a geometry.

Parameters

g	the input geometry

Returns

the computed boundary

getBoundary() [3/3]

static std::unique_ptr< geom::Geometry > geos::operation::BoundaryOp::getBoundary ( const geom::Geometry &  g, const algorithm::BoundaryNodeRule &  bnRule  )

static

Computes a geometry representing the boundary of a geometry, using an explicit BoundaryNodeRule.

Parameters

g	the input geometry
bnRule	the Boundary Node Rule to use

Returns

the computed boundary

hasBoundary()

static bool geos::operation::BoundaryOp::hasBoundary ( const geom::Geometry &  geom, const algorithm::BoundaryNodeRule &  boundaryNodeRule  )

static

Tests if a geometry has a boundary (it is non-empty). The semantics are:

• Empty geometries do not have boundaries.
• Points do not have boundaries.
• For linear geometries the existence of the boundary is determined by the BoundaryNodeRule.
• Non-empty polygons always have a boundary.

Parameters

geom	the geometry providing the boundary
boundaryNodeRule	the Boundary Node Rule to use

Returns

true if the boundary exists

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

• BoundaryOp.h