Class SegmentExtractingNoder

java.lang.Object
org.locationtech.jts.noding.SegmentExtractingNoder
All Implemented Interfaces:
Noder

public class SegmentExtractingNoder extends Object implements Noder
A noder which extracts all line segments as SegmentStrings. This enables fast overlay of geometries which are known to be already fully noded. In particular, it provides fast union of polygonal and linear coverages. Unioning a noded set of lines is an effective way to perform line merging and line dissolving.

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 Details

    • SegmentExtractingNoder

      public SegmentExtractingNoder()
      Creates a new segment-extracting noder.
  • Method Details

    • 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