Class LinearRing

Models an OGC SFS LinearRing.

Inheritance
object
Geometry
LineString
LinearRing
Implements
Inherited Members
Namespace: NetTopologySuite.Geometries
Assembly: NetTopologySuite.dll
Syntax
[Serializable]
public class LinearRing : LineString, IComparable, IComparable<Geometry>, ILineal
Remarks

A LinearRing is a LineString which is both closed and simple. In other words, the first and last coordinate in the ring must be equal, and the ring must not self-intersect. Either orientation of the ring is allowed.

A ring must have either 0 or 3 or more points. The first and last points must be equal (in 2D). If these conditions are not met, the constructors throw an ArgumentException
A ring with 3 points is invalid, because it is collapsed and thus has a self-intersection. It is allowed to be constructed so that it can be represented, and repaired if needed.

Constructors

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LinearRing(CoordinateSequence, GeometryFactory)

Constructs a LinearRing with the vertices specified by the given CoordinateSequence.

Declaration
public LinearRing(CoordinateSequence points, GeometryFactory factory)
Parameters
Type Name Description
CoordinateSequence points

A sequence points forming a closed and simple linestring, or null to create the empty geometry.
GeometryFactory factory

The factory that creates this LinearRing
Exceptions
Type Condition
ArgumentException

If the ring is not closed, or has too few points
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LinearRing(Coordinate[])

Initializes a new instance of the LinearRing class.

Declaration
public LinearRing(Coordinate[] points)
Parameters
Type Name Description
Coordinate[] points

The points used for create this instance.
Remarks

For create this Geometry is used a standard GeometryFactory with PrecisionModel == Floating.

Exceptions
Type Condition
ArgumentException

If the ring is not closed, or has too few points

Fields

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MinimumValidSize

The minimum number of vertices allowed in a valid non-empty ring. Empty rings with 0 vertices are also valid.

Declaration
public const int MinimumValidSize = 3
Field Value
Type Description
int

Properties

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BoundaryDimension

Returns Dimensions.False, since by definition LinearRings do not have a boundary.

Declaration
public override Dimension BoundaryDimension { get; }
Property Value
Type Description
Dimension
Overrides
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GeometryType

Returns the name of this object's interface.

Declaration
public override string GeometryType { get; }
Property Value
Type Description
string

"LinearRing"
Overrides
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IsCCW

Gets a value indicating if this LINEARRING is oriented CounterClockwise

Declaration
public bool IsCCW { get; }
Property Value
Type Description
bool
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IsClosed

Declaration
public override bool IsClosed { get; }
Property Value
Type Description
bool
Overrides
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SortIndex

Gets a value to sort the geometry

Declaration
protected override Geometry.SortIndexValue SortIndex { get; }
Property Value
Type Description
Geometry.SortIndexValue
Overrides
Remarks

NOTE:
For JTS v1.17 this property's getter has been renamed to getTypeCode(). In order not to break binary compatibility we did not follow.

Methods

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CopyInternal()

An internal method to copy subclass-specific geometry data.

Declaration
protected override Geometry CopyInternal()
Returns
Type Description
Geometry

A copy of the target geometry object.
Overrides
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Reverse()

Computes a new geometry which has all component coordinate sequences in reverse order (opposite orientation) to this one.

Declaration
[Obsolete("Call Geometry.Reverse()")]
public override Geometry Reverse()
Returns
Type Description
Geometry

A reversed geometry
Overrides
Remarks

Don't override this function, implement ReverseInternal().

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ReverseInternal()

The actual implementation of the Reverse() function for LINEARRINGs.

Declaration
protected override Geometry ReverseInternal()
Returns
Type Description
Geometry

A reversed geometry
Overrides

Implements

Extension Methods