Return-Path: Received: (qmail 31537 invoked from network); 4 Jan 2003 22:53:59 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 4 Jan 2003 22:53:59 -0000 Received: (qmail 3405 invoked from network); 4 Jan 2003 22:53:41 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 4 Jan 2003 22:53:41 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.12) id 18Ux9s-0000cH-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 04 Jan 2003 22:52:48 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [167.142.228.65] (helo=cgpf1.cgp.netins.net) by post.thorcom.com with esmtp (Exim 4.12) id 18Ux9s-0000c8-00 for rsgb_lf_group@blacksheep.org; Sat, 04 Jan 2003 22:52:48 +0000 Received: from [167.142.32.126] (HELO netins.net) by cgpf1.cgp.netins.net (CommuniGate Pro SMTP 3.5.9) with ESMTP id 234628057; Sat, 04 Jan 2003 16:52:46 -0600 Message-ID: <3E1765BE.8060708@netins.net> Date: Sat, 04 Jan 2003 16:52:46 -0600 From: "Dr. Tom Gruis", "=?iso-8859-1?B?S9hIVEY=?=" Organization: www.gruis.org User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <5.1.0.14.2.20030104180813.00a0e1a0@mail.pncl.co.uk> Subject: Re: LF: Distance calculator (off topic) Content-Type: text/html; charset=windows-1252 X-Spam-Status: No, hits=-3.9 required=6.0tests=EMAIL_ATTRIBUTION,NOSPAM_INC,QUOTED_EMAIL_TEXT,REFERENCES, SPAM_PHRASE_01_02,USER_AGENT,USER_AGENT_MOZILLA_UA, X_ACCEPT_LANGversion=2.43 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Content-transfer-encoding: 8bit Hi from Iowa, USA!

Please shhot me an E-copy of your distance calculating program!

Many thanx & 73,

Doc.

Walter Blanchard wrote:

At 07:32 04/01/03 G0MRF wrote:

Hello Group. Happy New Year.

Does anyone know of, or have, any windows software that can calculate distances based on the UK National Grid Reference system? (e.g. TQ147951 )

I have one for the Maidenhead system (if anyone would like it just ask) but not for calculating distance between two NGR's.

Many Thanks

73

David

I wrote a little program 15 yrs ago to do this, available free to anyone who wants it.
Also converts NGR to/from lat/lon at about the 10m level.
Will not pass this reflector as an attachment. Sent one to David direct.

NGR distances are easy to do in a spreadsheet . Unlike Maidenhead and Lat/Lon
NG is a true rectilinear grid so if you know how to translate NGR's
given as e.g. TQ 169483 into actual Eastings and Northings in terms of metres
all you have to do is a root sum of squares equation. Done this way
distances will be correct but bearings will be in terms of Grid North - about
2 degs different from True North in Central England. My program corrects for this
and gives bearings as degs True.

If you really want to go to town get onto Ordnance Survey's GPS website -
www.gps.gov.uk , get a password and log in and you can get, free, a
massive 10 Mb program that converts everything to everything at millimetre
accuracy (GridInquest). Or it lets you do conversions on-line.

Walter G3JKV.
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