Hi Don,

I'm assuming you mean UTM zone?

For UTM, given the zone number the formula for central meridian is: zone * 6 - 
183

UTM zones are 6 degrees wide.

>From this, you can generate the math for going in the other direction.

Thanks,
Orest.

From: [email protected] 
[mailto:[email protected]] On Behalf Of Don C. MacGregor
Sent: Wednesday, January 28, 2009 12:26 PM
To: [email protected]
Subject: [mapguide-users] Longitude, Zone and Reference meridian

Hi folks
There is a linear relationship among Longitude, Zone and Reference meridian, 
does anyone know any formula to calculate Zone and Reference Meridian if I know 
Longitude?
Thanks



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