Spatial Search skipping records with small radius e.g. 1 mile
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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
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:
// 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);
[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);
}
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