NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Location Center of Responses thus Far
From: Bill Murdoch
Date: 2001 Jul 23, 7:45 PM
From: Bill Murdoch
Date: 2001 Jul 23, 7:45 PM
In a message dated 7/23/01 9:05:58 PM Eastern Daylight Time, glendonJLM@BIGPOND.COM writes: > Its an optimisation problem isn't it? > > Let x be the unknown location centre > Let D(i) be the great circle distance between the i th member and x > Then we want to choose x such as to: > minimise{sum of [ D(i); i=1-n]} > > or, minimise{sumof[ square of D(i): i=1-n]} > subject to x lying between lat and lon of 0-360 > > hmmm, shipping or airline companies must have tackled this one?? > Sounds military to me. Where should I park my guided missile submarine so that the average time of flight to my targets is a minimum ? Bill Murdoch