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LLink Algorithms

 
Currently only the L field algorithms are available.
 
The similarity is computed between all source locations and all references locations.
 
Three algorithms can be used.
 
  • Optimistic algorithm (opt) Computes the distance between sets of coordinates and retain the closest pair of coordinates for the computation of the local similarity coefficient.
     
  • Pessimistic algorithm (pes) Computes the distance between sets of coordinates and retain the most distant pair of coordinates for the computation of the local similarity coefficient.
     
  • Average distance
 
 
When two records have only one coordinate each, all three algorithms produce the same coefficient of similarity.
 
See the L fields section for more details on the algorithms.