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From Yonik Seeley <yo...@lucidimagination.com>
Subject Re: Fun with Spatial (Haversine formula)
Date Sat, 21 Aug 2010 03:13:20 GMT
On Fri, Aug 20, 2010 at 11:05 PM, Lance Norskog <goksron@gmail.com> wrote:
>  are latitudes equidistant on the surface of the sphere?

Yes - each degree of latitude is ~69 miles.
There is also a slight variation due to the earth not being a perfect sphere.

-Yonik
http://lucenerevolution.org Lucene/Solr Conference, Boston Oct 7-8

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