[Proj] Scale factor for Transverse Mercator
Gerald I. Evenden
geraldi.evenden at gmail.com
Wed Sep 10 15:37:26 EDT 2008
On Wednesday 10 September 2008 3:17:50 pm Clifford J Mugnier wrote:
> The State Plane Coordinate Systems were
> The Scale Factor at a Point maximum of
> 1:2,500 at the Central Meridian was considered OK for Fire Control because
> for this application, the 6° Zones were limited in longitudinal extent
> because of the convergence angle between Grid North and Geodetic North -
> soldiers don't really care that much about the difference between Grid
> Distance and Geodetic Distance ... the blast radius of a 155mm Howitzer
> shell takes care of that little "problem."
Under the same logic, I could never understand the reason for fuzzing the GPS
signals because what difference does a few meters mean with the blast radius
of an H-bomb?
The wonders of the military mind.
If one is laying in air burst of with 155 a little fuzz will not make much
difference because you are probably doing a carpet barrage anyway. But if
you are trying to knock out just one house in a city block (like they do with
the smart bombs) then ... . Curious about the electronics in some of the
newer artillery pieces. New command and control is something else from what
little I've seen and heard.
The whole religious complexion of the modern world is due
to the absence from Jerusalem of a lunatic asylum.
-- Havelock Ellis (1859-1939) British psychologist
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