[OSRS-PROJ] Re: Lambert Conformal Conic 1SP

Clifford J Mugnier cjmce at lsu.edu
Sun Feb 9 21:54:20 EST 2003

Strebe is correct, it is NOT arbitrary.  Just check the math; it is
directly related to the standard parallels as a defining parameter.  The
Latitude of minimum scale for a secant Lambert Conical Orthomorphic is the
same as the Latitude of Origin.

Do not confuse the Latitude of Origin with the False Origin.  The False
Origin is arbitrary, of course.  The Latitude of Origin of the projection
is close (but not exactly) to the mean of the two standard parallels.  It's
equal on the sphere, not the ellipsoid.

Cliff Mugnier
In a message dated 2003.02.09 18:20:17, gerald.evenden at verizon.net writes:

Also, latitude of origin for the secant form is arbitrary and does
not necessarily have to be at the point of unity scale factor.

I don't think the latitude of minimum scale would be an arbitrary latitude
of origin.

daan Strebe

PROJ.4 Discussion List
See http://www.remotesensing.org/proj for subscription, unsubscription
and other information.

More information about the Proj mailing list