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Posted to dev@lucenenet.apache.org by "Itamar Syn-Hershko (JIRA)" <ji...@apache.org> on 2012/05/20 02:46:41 UTC
[jira] [Commented] (LUCENENET-462) Spatial Search skipping records
with small radius e.g. 1 mile
[ https://issues.apache.org/jira/browse/LUCENENET-462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13279642#comment-13279642 ]
Itamar Syn-Hershko commented on LUCENENET-462:
----------------------------------------------
This is now fixed with the new spatial module
https://issues.apache.org/jira/browse/LUCENENET-489
> 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
> 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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