Oliver Kohll - Mailing Lists wrote:
On 21 Jul 2010, at 23:14, Joe Conway <mail@xxxxxxxxxxxxx
<mailto:mail@xxxxxxxxxxxxx>> wrote:
If you want something simple, and not requiring PostGIS, but plpgsql
instead, see:
http://archives.postgresql.org/pgsql-sql/2003-12/msg00193.php
For completeness, the earthdistance module also provides the distance
between two lat/longs, the point<@>point syntax is simple to use:
http://www.postgresql.org/docs/8.3/static/earthdistance.html
I did look at earthdistance before. Revisiting it now, thanks.
So, I'm trying to figure out this syntax. The docs say:
point <@> point - float8 - gives the distance in statue miles between
two points on the Earth's surface.
How does longitude and latitude fit into this picture? I can't find any
other documentation or examples?
I've got the contrib mods installed as 'select earth()' works fine.
Regards
Oliver Kohll
oliver@xxxxxxxxxxxxxxx <mailto:oliver@xxxxxxxxxxxxxxx> / +44(0)7814
828608 / skype:okohll
www.agilebase.co.uk <http://www.agilebase.co.uk> - software
--
Until later, Geoffrey
"I predict future happiness for America if they can prevent
the government from wasting the labors of the people under
the pretense of taking care of them."
- Thomas Jefferson
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