Lucene.Net.Spatial.BBox.AreaSimilarity Class Reference

The algorithm is implemented as envelope on envelope overlays rather than complex polygon on complex polygon overlays. Spatial relevance scoring algorithm:
queryArea = the area of the input query envelope
targetArea = the area of the target envelope (per Lucene document)
intersectionArea = the area of the intersection for the query/target envelopes
queryPower = the weighting power associated with the query envelope (default = 1.0)
targetPower = the weighting power associated with the target envelope (default = 1.0)
queryRatio = intersectionArea / queryArea;
targetRatio = intersectionArea / targetArea;
queryFactor = Math.pow(queryRatio,queryPower);
targetFactor = Math.pow(targetRatio,targetPower);
score = queryFactor /// targetFactor; Based on Geoportal's SpatialRankingValueSource. More...

Inherits Lucene.Net.Spatial.BBox.BBoxSimilarity.

Public Member Functions
	AreaSimilarity (Rectangle queryExtent, double queryPower, double targetPower)
	AreaSimilarity (Rectangle queryExtent)
String	GetDelimiterQueryParameters ()
double	Score (Rectangle target, Explanation exp)
override bool	Equals (object obj)
override int	GetHashCode ()

Detailed Description

The algorithm is implemented as envelope on envelope overlays rather than complex polygon on complex polygon overlays.

Spatial relevance scoring algorithm:

queryArea = the area of the input query envelope
targetArea = the area of the target envelope (per Lucene document)
intersectionArea = the area of the intersection for the query/target envelopes
queryPower = the weighting power associated with the query envelope (default = 1.0)
targetPower = the weighting power associated with the target envelope (default = 1.0)

queryRatio = intersectionArea / queryArea;
targetRatio = intersectionArea / targetArea;
queryFactor = Math.pow(queryRatio,queryPower);
targetFactor = Math.pow(targetRatio,targetPower);
score = queryFactor /// targetFactor;

Based on Geoportal's SpatialRankingValueSource.

.experimental

Definition at line 50 of file AreaSimilarity.cs.

Constructor & Destructor Documentation

Lucene.Net.Spatial.BBox.AreaSimilarity.AreaSimilarity	(	Rectangle	queryExtent,
		double	queryPower,
		double	targetPower
	)

Definition at line 61 of file AreaSimilarity.cs.

Lucene.Net.Spatial.BBox.AreaSimilarity.AreaSimilarity

(

Rectangle

queryExtent

)

Definition at line 77 of file AreaSimilarity.cs.

Member Function Documentation

override bool Lucene.Net.Spatial.BBox.AreaSimilarity.Equals

(

object

obj

)

Definition at line 219 of file AreaSimilarity.cs.

String Lucene.Net.Spatial.BBox.AreaSimilarity.GetDelimiterQueryParameters

(

)

Definition at line 82 of file AreaSimilarity.cs.

override int Lucene.Net.Spatial.BBox.AreaSimilarity.GetHashCode

(

)

Definition at line 226 of file AreaSimilarity.cs.

double Lucene.Net.Spatial.BBox.AreaSimilarity.Score	(	Rectangle	target,
		Explanation	exp
	)

Implements Lucene.Net.Spatial.BBox.BBoxSimilarity.

Definition at line 87 of file AreaSimilarity.cs.

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The documentation for this class was generated from the following file:

• contrib/Spatial/BBox/AreaSimilarity.cs