Class BoundaryOp

Computes the boundary of a Geometry. Allows specifying the IBoundaryNodeRule 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.

Inheritance

object

BoundaryOp

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: NetTopologySuite.Operation

Assembly: NetTopologySuite.dll

Syntax

public class BoundaryOp

Constructors

BoundaryOp(Geometry)

Initializes a new instance of the BoundaryOp class for the given geometry.

Declaration

public BoundaryOp(Geometry geom)

Parameters

Type	Name	Description
Geometry	geom	The input geometry.

BoundaryOp(Geometry, IBoundaryNodeRule)

Initializes a new instance of the BoundaryOp class for the given geometry.

Declaration

public BoundaryOp(Geometry geom, IBoundaryNodeRule bnRule)

Parameters

Type	Name	Description
Geometry	geom	The input geometry.
IBoundaryNodeRule	bnRule	Tthe Boundary Node Rule to use.

Methods

GetBoundary()

Gets the computed boundary.

Declaration

public Geometry GetBoundary()

Returns

Type	Description
Geometry	The boundary geometry.

GetBoundary(Geometry)

Computes a geometry representing the boundary of a geometry.

Declaration

public static Geometry GetBoundary(Geometry g)

Parameters

Type	Name	Description
Geometry	g	The input geometry.

Returns

Type	Description
Geometry	The computed boundary.

GetBoundary(Geometry, IBoundaryNodeRule)

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

Declaration

public static Geometry GetBoundary(Geometry g, IBoundaryNodeRule bnRule)

Parameters

Type	Name	Description
Geometry	g	The input geometry.
IBoundaryNodeRule	bnRule	The Boundary Node Rule to use.

Returns

Type	Description
Geometry	The computed boundary.

HasBoundary(Geometry, IBoundaryNodeRule)

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 IBoundaryNodeRule.
• Non-empty polygons always have a boundary.

Declaration

public static bool HasBoundary(Geometry geom, IBoundaryNodeRule boundaryNodeRule)

Parameters

Type	Name	Description
Geometry	geom	The geometry providing the boundary
IBoundaryNodeRule	boundaryNodeRule	The Boundary Node Rule to use

Returns

Type	Description
bool	true if the boundary exists