NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: C.L. Holm
Date: 2003 Apr 14, 16:52 -0400
Are you trying to find a mathematic equation to describe the relationship between latitude and longitude as it varies by latitude? (e.g. 1 degree of latitude = 60 nm, 1 degree of longitude at 0 degrees (equator) = 60 nm, and 1 degree of longitude at 45 degrees (north or south) = ??)
-----Original Message-----
From: geoff@CS.HMC.EDU [mailto:geoff@CS.HMC.EDU]
Sent: Monday, April 14, 2003 4:40 PM
To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
Subject: Equations for Mercator projections?
I have some students who need to be able to convert lat/long into x/y
coordinates on a Mercator projection. They know the lat/long of the
upper-left corner and the scale of the map. They haven't had any
success finding equations on the Web. Does anybody have any pointers?
--
Geoff Kuenning geoff@cs.hmc.edu http://www.cs.hmc.edu/~geoff/
Perl is awk with skin cancer.
-- Henry Spencer
This e-mail message may contain legally privileged and/or confidential
information. If you are not the intended recipient(s), or the employee
or agent responsible for delivery of this message to the intended
recipient(s), you are hereby notified that any dissemination,
distribution or copying of this e-mail message is strictly prohibited.
If you have received this message in error, please immediately notify
the sender and delete this e-mail message from your computer.