Return-Path: Received: (qmail 18575 invoked from network); 4 Jan 2003 18:08:34 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 4 Jan 2003 18:08:34 -0000 Received: (qmail 566 invoked from network); 4 Jan 2003 18:08:17 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 4 Jan 2003 18:08:17 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-SQ: A X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 4.12) id 18Ushu-0008P7-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 04 Jan 2003 18:07:38 +0000 Received: from [212.35.226.183] (helo=k2.pncl.co.uk) by post.thorcom.com with esmtp (Exim 4.12) id 18Usht-0008Oy-00 for rsgb_lf_group@blacksheep.org; Sat, 04 Jan 2003 18:07:37 +0000 Received: from k7t.pncl.co.uk (155.234.35.212.in-addr.arpa.ip-pool.cix.co.uk [212.35.234.155]) by k2.pncl.co.uk (8.12.3/8.12.3/Debian -4) with ESMTP id h04I7ZaR002833 for ; Sat, 4 Jan 2003 18:07:36 GMT Message-ID: <5.1.0.14.2.20030104180813.00a0e1a0@mail.pncl.co.uk> X-Sender: blanch@mail.pncl.co.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Sat, 04 Jan 2003 18:08:25 +0000 To: rsgb_lf_group@blacksheep.org From: "Walter Blanchard" MIME-Version: 1.0 Subject: LF: Distance calculator (off topic) Content-Type: multipart/mixed; boundary="------------010807020706040206050200" X-Spam-Status: No, hits=-1.1 required=6.0tests=EMAIL_ATTRIBUTION,SPAM_PHRASE_01_02version=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 This is a multi-part message in MIME format. --------------010807020706040206050200 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit 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.
--------------010807020706040206050200 Content-Type: text/plain; charset=windows-1252; name="ATT12444.txt" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="ATT12444.txt" --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.427 / Virus Database: 240 - Release Date: 06/12/02 --------------010807020706040206050200--