From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: distance from Easter Island to Chile Date: Sun, 20 Apr 2014 17:22:39 +0200 Organization: Aioe.org NNTP Server Message-ID: <87ha5o81q8.fsf@nl106-137-194.student.uu.se> References: <87mwfguasr.fsf@nl106-137-194.student.uu.se> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1398007523 27796 80.91.229.3 (20 Apr 2014 15:25:23 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 20 Apr 2014 15:25:23 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Apr 20 17:25:18 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WbtcM-000680-E0 for geh-help-gnu-emacs@m.gmane.org; Sun, 20 Apr 2014 17:25:18 +0200 Original-Received: from localhost ([::1]:45881 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WbtcL-0002aa-Sq for geh-help-gnu-emacs@m.gmane.org; Sun, 20 Apr 2014 11:25:17 -0400 Original-Path: usenet.stanford.edu!news.tele.dk!news.tele.dk!small.news.tele.dk!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!news.stack.nl!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 27 Original-NNTP-Posting-Host: VVbyYd/iFZoeWNmD9i++cQ.user.speranza.aioe.org Original-X-Complaints-To: abuse@aioe.org User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) X-Notice: Filtered by postfilter v. 0.8.2 Cancel-Lock: sha1:WKRdI8qcDipE/jdiLO4B8sjU+L0= Mail-Copies-To: never Original-Xref: usenet.stanford.edu gnu.emacs.help:205002 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:97267 Archived-At: Barry Margolin writes: > How accurate does your input have to be for that to > be a significant? I.e. if you're calculating the > distance between two cities, and each city is 5 miles > wide, the distance is +/- 10 miles depending on where > in the two cities you decide to get the coordinates > from. So if the error in the formula is 2 miles, it's > less than the inaccuracy in the input, so the formula > should be good enough. Yes, let's make this crystal (ball) clear, this is an implementation of a mathematical formula - if anyone reading this is writing a school essay on geography, *don't* use data from this tool :) The data is correct but in a gross way. I don't know what the professionals do to calculate distances, but safe to say, they have more refined, more specific, more empirical "down-to-earth" methods (pardon the pun)! I thought that was clear, but no harm, now it is. -- underground experts united: http://user.it.uu.se/~embe8573