Finer granularity than 1 mile isn't accurate with
standard C# math. Also, there's already a 2nd
precise filter, if needed, in DistanceQueryBuilder,
that will make the filtering exact.
Namespace: Lucene.Net.Spatial.TierAssembly: Lucene.Net.Contrib.Spatial (in Lucene.Net.Contrib.Spatial.dll) Version: 2.9.1.2 (2.9.1.002)