geos::operation::relateng::RelateNG Class Reference

#include <RelateNG.h>

Public Member Functions
std::unique_ptr< IntersectionMatrix >	evaluate (const Geometry *b)
bool	evaluate (const Geometry *b, const std::string &imPattern)
bool	evaluate (const Geometry *b, TopologyPredicate &predicate)
bool	intersects (const Geometry *a)
bool	crosses (const Geometry *a)
bool	disjoint (const Geometry *a)
bool	touches (const Geometry *a)
bool	within (const Geometry *a)
bool	contains (const Geometry *a)
bool	overlaps (const Geometry *a)
bool	covers (const Geometry *a)
bool	coveredBy (const Geometry *a)
bool	equalsTopo (const Geometry *a)
bool	relate (const Geometry *a, const std::string &pat)
std::unique_ptr< IntersectionMatrix >	relate (const Geometry *a)

Static Public Member Functions
static bool	relate (const Geometry *a, const Geometry *b, TopologyPredicate &pred)
static bool	relate (const Geometry *a, const Geometry *b, TopologyPredicate &pred, const BoundaryNodeRule &bnRule)
static bool	relate (const Geometry *a, const Geometry *b, const std::string &imPattern)
static std::unique_ptr< IntersectionMatrix >	relate (const Geometry *a, const Geometry *b)
static std::unique_ptr< IntersectionMatrix >	relate (const Geometry *a, const Geometry *b, const BoundaryNodeRule &bnRule)
static std::unique_ptr< RelateNG >	prepare (const Geometry *a)
static std::unique_ptr< RelateNG >	prepare (const Geometry *a, const BoundaryNodeRule &bnRule)
static bool	intersects (const Geometry *a, const Geometry *b)
static bool	crosses (const Geometry *a, const Geometry *b)
static bool	disjoint (const Geometry *a, const Geometry *b)
static bool	touches (const Geometry *a, const Geometry *b)
static bool	within (const Geometry *a, const Geometry *b)
static bool	contains (const Geometry *a, const Geometry *b)
static bool	overlaps (const Geometry *a, const Geometry *b)
static bool	covers (const Geometry *a, const Geometry *b)
static bool	coveredBy (const Geometry *a, const Geometry *b)
static bool	equalsTopo (const Geometry *a, const Geometry *b)

Detailed Description

Computes the value of topological predicates between two geometries based on the Dimensionally-Extended 9-Intersection Model https://en.wikipedia.org/wiki/DE-9IM (DE-9IM). Standard and custom topological predicates are provided by RelatePredicate.

The RelateNG algorithm has the following capabilities:

• Efficient short-circuited evaluation of topological predicates (including matching custom DE-9IM matrix patterns)
• Optimized repeated evaluation of predicates against a single geometry via cached spatial indexes (AKA "prepared mode")
• Robust computation (only point-local topology is required, so invalid geometry topology does not cause failures)
• GeometryCollection inputs containing mixed types and overlapping polygons are supported, using union semantics.
• Zero-length LineStrings are treated as being topologically identical to Points.
• Support for BoundaryNodeRule.

See IntersectionMatrixPattern for a description of DE-9IM patterns.

If not specified, the standard BoundaryNodeRule::MOD2_BOUNDARY_RULE is used.

RelateNG operates in 2D only; it ignores any Z ordinates.

This implementation replaces RelateOp and PreparedGeometry.

FUTURE WORK

• Support for a distance tolerance to provide "approximate" predicate evaluation

Author

Martin Davis

See also

RelateOp

PreparedGeometry

Member Function Documentation

evaluate() [1/3]

std::unique_ptr<IntersectionMatrix> geos::operation::relateng::RelateNG::evaluate

(

const Geometry *

b

)

Computes the DE-9IM matrix for the topological relationship to a geometry.

Parameters

b	the B geometry to test against

Returns

the DE-9IM matrix

evaluate() [2/3]

bool geos::operation::relateng::RelateNG::evaluate	(	const Geometry *	b,
		const std::string &	imPattern
	)

Tests whether the topological relationship to a geometry matches a DE-9IM matrix pattern.

Parameters

b	the B geometry to test against
imPattern	the DE-9IM pattern to match

Returns

true if the geometries' topological relationship matches the DE-9IM pattern

See also

IntersectionMatrixPattern

evaluate() [3/3]

bool geos::operation::relateng::RelateNG::evaluate	(	const Geometry *	b,
		TopologyPredicate &	predicate
	)

Tests whether the topological relationship to a geometry satisfies a topology predicate.

Parameters

b	the B geometry to test against
predicate	the topological predicate

Returns

true if the predicate is satisfied

prepare() [1/2]

static std::unique_ptr<RelateNG> geos::operation::relateng::RelateNG::prepare ( const Geometry *  a )

static

Creates a prepared RelateNG instance to optimize the evaluation of relationships against a single geometry.

Parameters

a	the A input geometry

Returns

a prepared instance

prepare() [2/2]

static std::unique_ptr<RelateNG> geos::operation::relateng::RelateNG::prepare ( const Geometry *  a, const BoundaryNodeRule &  bnRule  )

static

Creates a prepared RelateNG instance to optimize the computation of predicates against a single geometry, using a given BoundaryNodeRule.

Parameters

a	the A input geometry
bnRule	the required BoundaryNodeRule

Returns

a prepared instance

relate() [1/5]

static std::unique_ptr<IntersectionMatrix> geos::operation::relateng::RelateNG::relate ( const Geometry *  a, const Geometry *  b  )

static

Computes the DE-9IM matrix for the topological relationship between two geometries.

Parameters

a	the A input geometry
b	the B input geometry

Returns

the DE-9IM matrix for the topological relationship

relate() [2/5]

static std::unique_ptr<IntersectionMatrix> geos::operation::relateng::RelateNG::relate ( const Geometry *  a, const Geometry *  b, const BoundaryNodeRule &  bnRule  )

static

Computes the DE-9IM matrix for the topological relationship between two geometries.

Parameters

a	the A input geometry
b	the B input geometry
bnRule	the Boundary Node Rule to use

Returns

the DE-9IM matrix for the relationship

relate() [3/5]

static bool geos::operation::relateng::RelateNG::relate ( const Geometry *  a, const Geometry *  b, const std::string &  imPattern  )

static

Tests whether the topological relationship to a geometry matches a DE-9IM matrix pattern.

Parameters

a	the A input geometry
b	the B input geometry
imPattern	the DE-9IM pattern to match

Returns

true if the geometries relationship matches the DE-9IM pattern

See also

IntersectionMatrixPattern

relate() [4/5]

static bool geos::operation::relateng::RelateNG::relate ( const Geometry *  a, const Geometry *  b, TopologyPredicate &  pred  )

static

Tests whether the topological relationship between two geometries satisfies a topological predicate.

Parameters

a	the A input geometry
b	the B input geometry
pred	the topological predicate

Returns

true if the topological relationship is satisfied

relate() [5/5]

static bool geos::operation::relateng::RelateNG::relate ( const Geometry *  a, const Geometry *  b, TopologyPredicate &  pred, const BoundaryNodeRule &  bnRule  )

static

Tests whether the topological relationship between two geometries satisfies a topological predicate, using a given BoundaryNodeRule.

Parameters

a	the A input geometry
b	the B input geometry
pred	the topological predicate
bnRule	the Boundary Node Rule to use

Returns

true if the topological relationship is satisfied

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

• RelateNG.h