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List:       postgis-users
Subject:    [postgis-users] Buffering latlon features in meters
From:       Gregor at HostGIS <gregor () hostgis ! com>
Date:       2009-01-23 1:15:44
Message-ID: 49791A40.7050702 () hostgis ! com
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Hey, all. I posted a Wiki page about buffering latlon features in 
meters. It's old news that the trick is to reproject to a meters-based 
SRS, but the selection of which SRS is up in the air.

I got some great advice from nhv on #postgis and we came up with a 
solution that seems to work very well: make up your own SRS and know 
it'll work. :)

http://postgis.refractions.net/support/wiki/index.php?LatLon%20Circles%20in%20Meters

This seems a lot better than picking a UTM for data that goes outside 
the UTM's zone, or World Mercator, or a few other tricks I tried that 
weren't so great.

Comments are welcome, especially if you can improve on our mechanism.

-- 
Gregor Mosheh / Greg Allensworth    BS, A+, Network+, Security+, Server+
System Administrator, Lead Programmer
HostGIS development & hosting services, http://www.HostGIS.com/

"Remember that no one cares if you can back up,
  only if you can restore." - AMANDA
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