[OSRS-PROJ] Pseudo X/Y values, forward and reverse

Gerald I. Evenden gerald.evenden at verizon.net
Fri Jan 31 15:15:45 EST 2003

I am very sorry, but I consider the current thread nonsense.
Anyone carrying the TM projection ellipsoid projection beyond
3.5 degrees of the CM is up to no good.  UTM does not require
greater extension and the scale factor beyone 3.5 degrees
makes it useless as an accurate conformal projection.

Adding factors to the equations is merely a waste of computer

'Nuff said.

On Fri, 2003-01-31 at 00:22, Clifford J Mugnier wrote:
> William,
> Yes, it counts in BOTH directions.  I'm currently writing the chapter on
> "Object Space Coordinate Systems" for the new 5th edition of the "Manual of
> Photogrammetry," and I'm including up to the 7th derivative in both direct
> and inverse transformations.  Why weren't greater expansions included into
> PROJ4?  It's not a topic of general interest in cartography.  Cartographers
> generally ignore such things, including the late John P. Snyder.  John was
> only interested in what was germain to the U.S. Geological Survey and the
> scales of maps that they produced.  John was never interested in geodetic
> stuff.  John avoided datums and such things.

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