Class FrechetSimilarityMeasure

java.lang.Object
org.locationtech.jts.algorithm.match.FrechetSimilarityMeasure
All Implemented Interfaces:
SimilarityMeasure
public class FrechetSimilarityMeasure extends Object implements SimilarityMeasure
Measures the degree of similarity between two Geometrys using the Fréchet distance metric. The measure is normalized to lie in the range [0, 1]. Higher measures indicate a great degree of similarity.

The measure is computed by computing the Fréchet distance between the input geometries, and then normalizing this by dividing it by the diagonal distance across the envelope of the combined geometries.

Note: the input should be normalized, especially when measuring MultiPoint geometries because for the Fréchet distance the order of Coordinates is important.

Author:
Felix Obermaier

  • Constructor Details

    • FrechetSimilarityMeasure

      public FrechetSimilarityMeasure()
      Creates an instance of this class.

  • Method Details

    • measure

      public double measure(Geometry g1, Geometry g2)
      Description copied from interface: SimilarityMeasure
      Computes the similarity measure between two geometries
      Specified by:
      measure in interface SimilarityMeasure
      Parameters:
      g1 - a geometry
      g2 - a geometry
      Returns:
      the value of the similarity measure, in [0.0, 1.0]