Class FastNodingValidator

Validates that a collection of ISegmentStrings is correctly noded. Indexing is used to improve performance.

Inheritance

object

FastNodingValidator

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: NetTopologySuite.Noding

Assembly: NetTopologySuite.dll

Syntax

public class FastNodingValidator

Remarks

By default validation stops after a single non-noded intersection is detected. Alternatively, it can be requested to detect all intersections by using the FindAllIntersections property.

The validator does not check for topology collapse situations (e.g. where two segment strings are fully co-incident).

The validator checks for the following situations which indicated incorrect noding:

The client may either test the IsValid condition, or request that a suitable TopologyException be thrown.

Constructors

FastNodingValidator(IEnumerable<ISegmentString>)

Creates a new noding validator for a given set of linework.

Declaration

public FastNodingValidator(IEnumerable<ISegmentString> segStrings)

Parameters

Type	Name	Description
IEnumerable<ISegmentString>	segStrings	A collection of ISegmentStrings

Properties

FindAllIntersections

Gets or sets whether all intersections should be found.

Declaration

public bool FindAllIntersections { get; set; }

Property Value

Type	Description
bool

Intersections

Gets a list of all intersections found. Intersections are represented as Coordinates. List is empty if none were found.

Declaration

public IList<Coordinate> Intersections { get; }

Property Value

Type	Description
IList<Coordinate>

IsValid

Checks for an intersection and reports if one is found.

Declaration

public bool IsValid { get; }

Property Value

Type	Description
bool

Methods

CheckValid()

Checks for an intersection and throws a TopologyException if one is found.

Declaration

public void CheckValid()

Exceptions

Type	Condition
TopologyException	if an intersection is found

ComputeIntersections(IEnumerable<ISegmentString>)

Gets a list of all intersections found. Intersections are represented as Coordinates. List is empty if none were found.

A collection of SegmentStrings a list of Coordinate

Declaration

public static IList<Coordinate> ComputeIntersections(IEnumerable<ISegmentString> segStrings)

Parameters

Type	Name	Description
IEnumerable<ISegmentString>	segStrings

Returns

Type	Description
IList<Coordinate>

GetErrorMessage()

Returns an error message indicating the segments containing the intersection.

Declaration

public string GetErrorMessage()

Returns

Type	Description
string	an error message documenting the intersection location

See Also

NodingValidator