Package org.locationtech.jts.noding
Class BoundaryChainNoder
java.lang.Object
org.locationtech.jts.noding.BoundaryChainNoder
- All Implemented Interfaces:
Noder
A noder which extracts chains of boundary segments
as
SegmentString
s 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
.
Using this noder is faster than invalid reference
CoverageUnion
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
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
computeNodes
(Collection segStrings) Computes the noding for a collection ofSegmentString
s.Returns aCollection
of fully nodedSegmentString
s.
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Constructor Details
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BoundaryChainNoder
public BoundaryChainNoder()Creates a new boundary-extracting noder.
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Method Details
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computeNodes
Description copied from interface:Noder
Computes the noding for a collection ofSegmentString
s. Some Noders may add all these nodes to the input SegmentStrings; others may only add some or none at all.- Specified by:
computeNodes
in interfaceNoder
- Parameters:
segStrings
- a collection ofSegmentString
s to node
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getNodedSubstrings
Description copied from interface:Noder
Returns aCollection
of fully nodedSegmentString
s. The SegmentStrings have the same context as their parent.- Specified by:
getNodedSubstrings
in interfaceNoder
- Returns:
- a Collection of SegmentStrings
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