Class BoundaryOp

Namespace

NetTopologySuite.Operation

Assembly

NetTopologySuite.dll

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.

public class BoundaryOp

Inheritance

object

BoundaryOp

Inherited Members

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Constructors

BoundaryOp(Geometry)

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

public BoundaryOp(Geometry geom)

Parameters

geom Geometry

The input geometry.

BoundaryOp(Geometry, IBoundaryNodeRule)

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

public BoundaryOp(Geometry geom, IBoundaryNodeRule bnRule)

Parameters

geom Geometry

The input geometry.

bnRule IBoundaryNodeRule

Tthe Boundary Node Rule to use.

Methods

GetBoundary()

Gets the computed boundary.

public Geometry GetBoundary()

Returns

Geometry

The boundary geometry.

GetBoundary(Geometry)

Computes a geometry representing the boundary of a geometry.

public static Geometry GetBoundary(Geometry g)

Parameters

g Geometry

The input geometry.

Returns

Geometry

The computed boundary.

GetBoundary(Geometry, IBoundaryNodeRule)

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

public static Geometry GetBoundary(Geometry g, IBoundaryNodeRule bnRule)

Parameters

g Geometry

The input geometry.

bnRule IBoundaryNodeRule

The Boundary Node Rule to use.

Returns

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.

public static bool HasBoundary(Geometry geom, IBoundaryNodeRule boundaryNodeRule)

Parameters

geom Geometry

The geometry providing the boundary

boundaryNodeRule IBoundaryNodeRule

The Boundary Node Rule to use

Returns

bool

true if the boundary exists