Class FastNodingValidator

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

Inheritance
Object
FastNodingValidator
Inherited Members
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

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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

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FindAllIntersections

Gets or sets whether all intersections should be found.

Declaration
public bool FindAllIntersections { get; set; }
Property Value
Type Description
Boolean
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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>
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IsValid

Checks for an intersection and reports if one is found.

Declaration
public bool IsValid { get; }
Property Value
Type Description
Boolean

Methods

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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
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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>
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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