Hi Tim, Depending on your accuracy needs, you may achive some leeway by utilizing a stereographic projection (projection = 20) in an mbx.
In effect, it flattens the Earth around a chosen point, making simple flat geometry possible. I've used this method to plot great circles without having to resort to complex formulas. Best regards / Med venlig hilsen Lars V. Nielsen -------------------------------------------------------- Hvenegaard & Meklenborg Rugaardsvej 55, DK-5000 Odense C Denmark http://www.hvm.dk ----- Original Message ----- From: "Tim Smith" <[EMAIL PROTECTED]> To: "Stefan Majtan" <[EMAIL PROTECTED]>; "MI-list" <[EMAIL PROTECTED]> Sent: Wednesday, April 14, 2004 4:47 PM Subject: RE: MI-L Distance & Bearing Calculation > Thanks Stefan, > > What I need is a certified piece of software that can calculate the distance and bearing. It doesn't necessarily need to be MapInfo (or implemented in). I have found various on-line converters but I'm not sure which ones are reliable. > > I am surprised MapInfo does not include GIS calculation tools for bearing and distance calculations - or have I just missed something? > > I downloaded Sean Reese's application, but I need to be able to manually enter the lon/lat for each point. > > Do you think this calculator would be a good choice? > http://www.ngs.noaa.gov/cgi-bin/Inv_Fwd/inverse.prl > > Cheers > > Tim > > -----Original Message----- > From: Stefan Majtan [mailto:[EMAIL PROTECTED] > Sent: 07 April 2004 12:38 > To: Tim Smith; MI-list > Subject: Re: MI-L Distance & Bearing Calculation > > > Dear Tim, > > You can try this: > > 1. Go to directionsmag (http://www.directionsmag.com/files/) and in search > section write bearing. Sean Reese wrote application which you need. 2. or if you need ONLY distance, you can find SQL statement for it in > older mails on this list. > 3. or if you have a huge number of the points, you can download CalcDist > PRO (from http://www.terris.sk) which will do the job instead you. > > Hope this help you. > > Regards Stefan Majtan > > > ************************************************************************** > TERRIS > GIS Applications Development > Grid Analyser - raster GIS for native MapInfo grid > > Pod z�hradkami 24 > 909 01 Skalica > SLOVAKIA > http://www.terris.sk > ************************************************************************** > > > > > On Wed, 7 Apr 2004 12:23:40 +0100, Tim Smith <[EMAIL PROTECTED]> wrote: > > > How do I use MapInfo to calculate the distance and bearing between two > > points using the WGS-84 projection? > > > > I don't know much about MapInfo (having just purchased it). I'm due to > > go on a training course, so hopefully I won't be asking such simple > > questions in the future. > > > > Thanks in advance for any help. > > > > > > > > All literature contained within this message and/or attached, is the > > opinion of myself and does not reflect the opinion of the company. > > > > Tim Smith > > Software Engineer > > > > Micromill Electronics Limited > > Leydene House > > Waterberry Drive > > Waterlooville > > Hants > > PO7 7XX > > > > Tel: +44 (0) 23 92 366600 > > Fax: +44 (0) 23 92 364 068 > > Sales Fax: +44 (0) 23 92 366673 > > > > email: [EMAIL PROTECTED] > > > > Registered No. 1456922 (England). > > Registered Office Brook Road > > Wimborne, Dorset BH21 2BJ > > ********************************************************************* > > This e-mail and any attached files are confidential and may be legally > > privileged. 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