Object

org.locationtech.geomesa.process.knn

KNNQuery

Related Doc: package knn

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object KNNQuery extends LazyLogging

This object contains the main algorithm for the GeoHash-based iterative KNN search.

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  1. final def !=(arg0: Any): Boolean

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  8. def finalize(): Unit

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  9. def generateKNNQuery(gh: GeoHash, oldQuery: Query, source: SimpleFeatureSource): Query

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    Generate a new query by narrowing another down to a single GeoHash

  10. final def getClass(): Class[_]

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  15. final def notify(): Unit

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  16. final def notifyAll(): Unit

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  17. def runKNNQuery(source: SimpleFeatureSource, query: Query, ghPQ: GeoHashSpiral, sfPQ: NearestNeighbors): NearestNeighbors

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    Recursive function to iteratively query a number of geohashes and insert their results into a NearestNeighbors priority queue

    Recursive function to iteratively query a number of geohashes and insert their results into a NearestNeighbors priority queue

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    @tailrec()
  18. def runNewKNNQuery(source: SimpleFeatureSource, query: Query, numDesired: Int, searchDistanceInMeters: Double, maxDistanceInMeters: Double, aFeatureForSearch: SimpleFeature): NearestNeighbors

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    Method to kick off a new KNN query about aFeatureForSearch

    Method to kick off a new KNN query about aFeatureForSearch

    Situations where maxDistanceInMeters is set too small may cause the search to not actually find the K nearest neighbors, but still permit K neighbors to be found, resulting in incorrect results. To be addressed in GEOMESA-285.

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