SnappingNoder (JTS Topology Suite 1.18.2 API)

java.lang.Object
- org.locationtech.jts.noding.snap.SnappingNoder

All Implemented Interfaces:

Noder
```
public class SnappingNoder
extends java.lang.Object
implements Noder
```
Nodes a set of segment strings snapping vertices and intersection points together if they lie within the given snap tolerance distance. Vertices take priority over intersection points for snapping. Input segment strings are generally only split at true node points (i.e. the output segment strings are of maximal length in the output arrangement).
The snap tolerance should be chosen to be as small as possible while still producing a correct result. It probably only needs to be small enough to eliminate "nearly-coincident" segments, for which intersection points cannot be computed accurately. This implies a factor of about 10e-12 smaller than the magnitude of the segment coordinates.
With an appropriate snap tolerance this algorithm appears to be very robust. So far no failure cases have been found, given a small enough snap tolerance.
The correctness of the output is not verified by this noder. If required this can be done by ValidatingNoder.

Version:

1.17

Constructor Summary

Constructors
Constructor Description

SnappingNoder(double snapTolerance)
Creates a snapping noder using the given snap distance tolerance.

Method Summary

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

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

- Constructor Detail
  - SnappingNoder
```
public SnappingNoder(double snapTolerance)
```
    Creates a snapping noder using the given snap distance tolerance.
    
    Parameters:
    
    snapTolerance - points are snapped if within this distance
- Method Detail
  - getNodedSubstrings
```
public java.util.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 NodedSegmentStrings representing the substrings
  - computeNodes
```
public void computeNodes(java.util.Collection inputSegStrings)
```
    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:
    
    inputSegStrings - a Collection of SegmentStrings