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From "Prescott Nasser (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (LUCENENET-462) Spatial Search skipping records with small radius e.g. 1 mile
Date Wed, 30 May 2012 15:47:23 GMT

     [ https://issues.apache.org/jira/browse/LUCENENET-462?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prescott Nasser closed LUCENENET-462.
-------------------------------------

    
> Spatial Search skipping records with small radius e.g. 1 mile
> -------------------------------------------------------------
>
>                 Key: LUCENENET-462
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-462
>             Project: Lucene.Net
>          Issue Type: Bug
>          Components: Lucene.Net Contrib
>    Affects Versions: Lucene.Net 2.9.4
>         Environment: .Net framework 4.0
>            Reporter: Mark Rodseth
>            Assignee: Itamar Syn-Hershko
>              Labels: lucene, spatialsearch
>
> Running a spatial query against a list of locations all within 1 mile of a location returns
correct results for 2 miles, but incorrect results for 1 mile. For the one mile query, only
2 of the 8 rows are returned. 
> Locations & Test below:
> {code}
> // Origin
> private double _lat = 51.508129;
> private double _lng = -0.128005;
> private const string LatField = "lat";
> private const string LngField = "lng";
> // Locations
> AddPoint(writer, "Location 1", 51.5073802128877, -0.124669075012207);
> AddPoint(writer, "Location 2", 51.5091, -0.1235);
> AddPoint(writer, "Location 3", 51.5093, -0.1232);
> AddPoint(writer, "Location 4", 51.5112531582845, -0.12509822845459);
> AddPoint(writer, "Location 5", 51.5107, -0.123);
> AddPoint(writer, "Location 6", 51.512, -0.1246);
> AddPoint(writer, "Location 8", 51.5088760101322, -0.143165588378906);
> AddPoint(writer, "Location 9", 51.5087958793819, -0.143508911132813);
> {code}
> {code}
> [Test]
> public void TestAntiM()
> {
> 	_searcher = new IndexSearcher(_directory, true);
> 	const double miles = 1.0; // Bug? Only returns 2 locations. Should return 8. 
> 	// const double miles = 2.0; // Correct. Returns 8 Locations.
> 	Console.WriteLine("testAntiM");
> 	// create a distance query
> 	var dq = new DistanceQueryBuilder(_lat, _lng, miles, LatField, LngField, CartesianTierPlotter.DefaltFieldPrefix,
true);
> 	Console.WriteLine(dq);
> 	//create a term query to search against all documents
> 	Query tq = new TermQuery(new Term("metafile", "doc"));
> 	var dsort = new DistanceFieldComparatorSource(dq.DistanceFilter);
> 	Sort sort = new Sort(new SortField("foo", dsort, false));
> 	// Perform the search, using the term query, the distance filter, and the
> 	// distance sort
> 	TopDocs hits = _searcher.Search(tq, dq.Filter, 1000, sort);
> 	int results = hits.totalHits;
> 	ScoreDoc[] scoreDocs = hits.scoreDocs;
> 	// Get a list of distances
> 	Dictionary<int, Double> distances = dq.DistanceFilter.Distances;
> 	Console.WriteLine("Distance Filter filtered: " + distances.Count);
> 	Console.WriteLine("Results: " + results);
> 	Console.WriteLine("=============================");
> 	Console.WriteLine("Distances should be 8 " + distances.Count);
> 	Console.WriteLine("Results should be 8 " + results);
> 	Assert.AreEqual(8, distances.Count); // fixed a store of only needed distances
> 	Assert.AreEqual(8, results);
> }
> {code}

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