[postgis-users] SRID for analyzing a USA national data set in Meters

[David William Bitner]

He wanted 25 miles, distance_sphere returns meters, it's a rough conversion
factor.

On 4/2/07, Jeremy Dunck <jdunck at gmail.com> wrote:
>
> On 4/2/07, David William Bitner <david.bitner at gmail.com> wrote:
> ...
> > distance_sphere(hospital1geom,hospitals2geom)<25*1609 order
>
> What's the 1609 for?
> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users
>



-- 
************************************
David William Bitner
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20070402/59231a63/attachment.html>