Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!purdue!haven!decuac!netsys!vector!telecom-gateway From: convex!eric@cirr.com (Eric Schnoebelen) Newsgroups: comp.dcom.telecom Subject: Re: Coordinate Tape Info Request Message-ID: Date: 12 Oct 89 19:11:37 GMT Reply-To: Eric Schnoebelen Organization: Central Iowa (Model) Railroad, Dallas, Tx. Lines: 29 Approved: telecom-request@vector.dallas.tx.us [ I started to mail this, then thought it might be of general interest. Enjoy, Eric ] In article you write: -I just loaded my Bellcore V&H Coordinate tape onto my VAX to help with -my project I mentioned in an earlier post, my new question is: -What are the units of those coordinates? and What document am I -missing that would tell me this? Well, it is my understanding that the units in the V&H master database are miles. This allows the milage based costing of the phone company services to be calculated using the simple distance formula: sqrt( (x1- x2)^2 + (y1 - y2)^2 ) although the phone companies really use the following formula: sqrt( ( (v1 - v2)^2 + (h1 -h2)^2 )/10 ). Don't ask me why.... I once asked the resident network design engineers, and they gave me an answer that I don't really remember, but could be summed up as they really didn't know either.... Hope this helps, Eric Schnoebelen eric@egsner.cirr.com "My other computer is a Convex" schnoebe@convex.com