Class LineMerger
- java.lang.Object
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- org.locationtech.jts.operation.linemerge.LineMerger
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public class LineMerger extends java.lang.Object
Merges a collection of linear components to form maximal-length linestrings.Merging stops at nodes of degree 1 or degree 3 or more. In other words, all nodes of degree 2 are merged together. The exception is in the case of an isolated loop, which only has degree-2 nodes. In this case one of the nodes is chosen as a starting point.
The direction of each merged LineString will be that of the majority of the LineStrings from which it was derived.
Any dimension of Geometry is handled - the constituent linework is extracted to form the edges. The edges must be correctly noded; that is, they must only meet at their endpoints. The LineMerger will accept non-noded input but will not merge non-noded edges.
Input lines which are empty or contain only a single unique coordinate are not included in the merging.
- Version:
- 1.7
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Constructor Summary
Constructors Constructor Description LineMerger()
Creates a new line merger.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
add(java.util.Collection geometries)
Adds a collection of Geometries to be processed.void
add(Geometry geometry)
Adds a Geometry to be processed.java.util.Collection
getMergedLineStrings()
Gets theLineString
s created by the merging process.
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Method Detail
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add
public void add(Geometry geometry)
Adds a Geometry to be processed. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted.- Parameters:
geometry
- geometry to be line-merged
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add
public void add(java.util.Collection geometries)
Adds a collection of Geometries to be processed. May be called multiple times. Any dimension of Geometry may be added; the constituent linework will be extracted.- Parameters:
geometries
- the geometries to be line-merged
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getMergedLineStrings
public java.util.Collection getMergedLineStrings()
Gets theLineString
s created by the merging process.- Returns:
- the collection of merged LineStrings
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