[Proj] Extent of mercator

[Dean C. Mikkelsen]

Hi there.

Generally the same rules apply for the Mercator Projection as for the
UTM. 

The largest distortion appears at the poles. To avoid the most
distortions, avoid using Latitudes greater than 60 degrees North or
South. At these latitudes, most large government agencies and countries
turn to Conic Projections.

Cheers,
Dean


Dean C. Mikkelsen, B.Sc., P.Eng.
Terra ETL Ltd - Geodesy & GIS
Phone: 604-929-8630
E-mail: dcmikkelsen at shaw.ca


-----Original Message-----
From: proj-bounces at lists.maptools.org
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Stefan Biegger
Sent: Tuesday, August 09, 2005 9:36 AM
To: proj at lists.maptools.org
Subject: [Proj] Extent of mercator


Hi everybody

does somebody knows if there's a well defined limit of the extent when
using the mercator projection? For UTM, there's something like 'Latitude
from 84S to 80N'

Thanks a lot
Stefan

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