[Proj] Complex Transverse Mercator

Gerald I. Evenden gerald.evenden at verizon.net
Wed Jun 28 20:45:54 EDT 2006

On Wednesday 28 June 2006 4:33 pm, Oscar van Vlijmen wrote:
> > From: "Gerald I. Evenden"
> >
> > I strongly do not believe any of these new extended TMs should be use for
> > UTM as the "standard UTM" is defined as the taylor expansion---warts and
> > all. Anyone who has abused the limits of UTM will have trouble when using
> > new versions.  Secondly, UTM is bound by "law" to the limits of +-3.5
> > degrees so these extensions are immaterial.
> >
> >From my memory: wasn't the definition 3 degrees with an overlap of 40
> kilometers? Is about the same, but legally different.

You're probably right about that.

Another note, at the equator one only has to go about 4.5 degrees from the CM 
before the easting goes negative.  A no-no for grid applications.

Jerry and the low-riders: Daisy Mae and Joshua
"Cogito cogito ergo cogito sum"
   Ambrose Bierce, The Devil's Dictionary

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