BoundaryChainNoder (JTS Topology Suite 1.20.0 API)

java.lang.Object
- org.locationtech.jts.noding.BoundaryChainNoder

All Implemented Interfaces:

Noder
```
public class BoundaryChainNoder
extends Object
implements Noder
```
A noder which extracts chains of boundary segments as SegmentStrings from a polygonal coverage. Boundary segments are those which are not duplicated in the input polygonal coverage. Extracting chains of segments minimize the number of segment strings created, which produces a more efficient topological graph structure.
This enables fast overlay of polygonal coverages in CoverageUnion. Using this noder is faster than SegmentExtractingNoder and BoundarySegmentNoder.
No precision reduction is carried out. If that is required, another noder must be used (such as a snap-rounding noder), or the input must be precision-reduced beforehand.

Author:

Martin Davis

Constructor Summary

Constructors
Constructor Description

BoundaryChainNoder()
Creates a new boundary-extracting noder.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`computeNodes(Collection segStrings)`	Computes the noding for a collection of `SegmentString`s.
`Collection`	`getNodedSubstrings()`	Returns a `Collection` of fully noded `SegmentString`s.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BoundaryChainNoder
```
public BoundaryChainNoder()
```
    Creates a new boundary-extracting noder.
- Method Detail
  - computeNodes
```
public void computeNodes(Collection segStrings)
```
    Description copied from interface: Noder
    
    Computes the noding for a collection of SegmentStrings. Some Noders may add all these nodes to the input SegmentStrings; others may only add some or none at all.
    
    Specified by:
    
    computeNodes in interface Noder
    
    Parameters:
    
    segStrings - a collection of SegmentStrings to node
  - getNodedSubstrings
```
public Collection getNodedSubstrings()
```
    Description copied from interface: Noder
    
    Returns a Collection of fully noded SegmentStrings. The SegmentStrings have the same context as their parent.
    
    Specified by:
    
    getNodedSubstrings in interface Noder
    
    Returns:
    
    a Collection of SegmentStrings