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From Apache Wiki <wikidi...@apache.org>
Subject [Solr Wiki] Update of "SpatialSearch" by GrantIngersoll
Date Wed, 30 Jun 2010 16:02:02 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Solr Wiki" for change notification.

The "SpatialSearch" page has been changed by GrantIngersoll.
http://wiki.apache.org/solr/SpatialSearch?action=diff&rev1=24&rev2=25

--------------------------------------------------

  
  
  == Filtering Caveats ==
- === North/South Poles ==
+ === North/South Poles ===
- 
  When the bounding box includes a Pole, then the !LatLonType will automatically switch from
producing a bounding box to a "bounding bowl" (i.e. a spherical cap: http://mathworld.wolfram.com/SphericalCap.html)
whereby it will include all values that are North or South of the latitude of the would be
bounding box (the lower left and the upper right) that is closer to the equator.  In other
words, we still calculate what the coordinates of the upper right corner and the lower left
corner of the box would be just as in all other filtering cases, but we then take the corner
that is closest to the equator (since it goes over the pole it may not be the lower left,
despite the name) and do a latitude only filter.  Obviously, this means there will be more
matches than a pure bounding box match, but the query is much easier to construct and will
likely be faster, too.
  
  = Sorting =
@@ -116, +115 @@

  https://issues.apache.org/jira/browse/SOLR-1578 See https://issues.apache.org/jira/browse/SOLR-1568
  
  = Known Issues =
+ See https://issues.apache.org/jira/browse/SOLR-773 for tracking
- There are some underlying issues with Lucene's contrib/spatial related to:
- 
-  * Spatial Tiles and large distances: https://issues.apache.org/jira/browse/LUCENE-1921
-  * Issues around the poles: https://issues.apache.org/jira/browse/LUCENE-2367
  
  = Useful References =
   1. http://www.movable-type.co.uk/scripts/latlong.html

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