Package org.locationtech.jts.noding.snap
Class SnappingNoder
- java.lang.Object
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- org.locationtech.jts.noding.snap.SnappingNoder
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- 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
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Constructor Summary
Constructors Constructor Description SnappingNoder(double snapTolerance)
Creates a snapping noder using the given snap distance tolerance.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
computeNodes(java.util.Collection inputSegStrings)
Computes the noding of a set ofSegmentString
s.java.util.Collection
getNodedSubstrings()
Gets the noded result.
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Method Detail
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getNodedSubstrings
public java.util.Collection getNodedSubstrings()
Gets the noded result.- Specified by:
getNodedSubstrings
in interfaceNoder
- Returns:
- a Collection of NodedSegmentStrings representing the substrings
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computeNodes
public void computeNodes(java.util.Collection inputSegStrings)
Computes the noding of a set ofSegmentString
s.- Specified by:
computeNodes
in interfaceNoder
- Parameters:
inputSegStrings
- a Collection of SegmentStrings
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