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From Apache Wiki <wikidi...@apache.org>
Subject [Solr Wiki] Update of "FunctionQuery" by GrantIngersoll
Date Wed, 25 Nov 2009 12:57:52 GMT
Dear Wiki user,

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

The "FunctionQuery" page has been changed by GrantIngersoll.
http://wiki.apache.org/solr/FunctionQuery?action=diff&rev1=45&rev2=46

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  == hsin, ghhsin - Haversine Formula ==
  [[Solr1.5]]   See: https://issues.apache.org/jira/browse/SOLR-1302
  
- The Haversine distance calculates the distance between two points on a sphere when traveling
along the sphere.  In other words, it's the Great Circle distance.  See http://en.wikipedia.org/wiki/Great-circle_distance.
 In the case of GeohashHaversine, the sources must be a geohash value.
+ The Haversine distance calculates the distance between two points on a sphere when traveling
along the sphere.  In other words, it's the Great Circle distance.  See http://en.wikipedia.org/wiki/Great-circle_distance.
 In the case of !GeohashHaversine, the sources must be a geohash value.
  
- '''Values must be in Radians'''.  Please note Haversine distance has known problems with
antipodal values.  See the Wiki page.
+ '''Values must be in Radians'''.  See the rad() function. Please note Haversine distance
has known problems with antipodal values.  See the Wikipedia page for details.
  
  Signature: hsin(x1,y1,x2,y2, radius), ghhsin(hash1, hash2, radius)
  
- Example: hsin(x, y, 0, 0, 1) - Calculate the haversin distance between the lat/lon 0, 0
and the values in field x,y with a radius of 1.
+ Example: hsin(x, y, 0, 0, 1) - Calculate the haversine distance between the lat/lon 0, 0
and the values in field x,y with a radius of 1.
  
  == geohash - Convert to geohash ==
  Given a latitude and longitude (in degrees, not radians), convert them to a Geohash.  See
http://en.wikipedia.org/wiki/Geohash.

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