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Re: Meridional Distances
From: Vic Fraenckel
Date: 2002 Sep 17, 20:30 -0400
From: Vic Fraenckel
Date: 2002 Sep 17, 20:30 -0400
Am I missing something in this discussion? (Most likely) If you know the latitude and longitude of your departure and arrival points why not just calculate the ellipsoidal azimuth and distance from one to the other directly? Vic ________________________________________________________ Victor Fraenckel - The Windman vfraenc1@nycap.rr.com KC2GUI www.windsway.com Home of the WindReader Electronic Theodolite Read the WIND "Victory at all costs, victory in spite of all terror, victory however long and hard the road may be; for without victory there is no survival." - Winston [Leonard Spencer] Churchill (1874 - 1965) Dost thou not know, my son, with how little wisdom the world is governed? -Count Oxenstierna (ca 1620) ----- Original Message ----- From: "Chuck Taylor"To: Sent: Tuesday, September 17, 2002 12:20 PM Subject: Re: Meridional Distances | > | > Although I have tables accurate to 2 decimal places for the Meridional | > Parts, the Meridional Distances come only in whole degrees, so need to | > be interpelated for in-between values. | | Peter, | | Bowditch has tables of Meridional Parts to quite a number of decimal places. | The method for computing distances using Meridional Parts is called "Mercator | Sailing" and is also described in Bowditch. | | The introduction to the tables in Bowditch gives a formula for computing | Meridional Parts. I have programmed this into a calculator. One could also | program it into a spreadsheet. If memory serves me correctly (I'm away from my | home library) there is a typo in the formula in Bowditch 95, but Bowditch 80/84 | Volume 2 has it right. | | Best regards, | | Chuck Taylor | Everett, WA, USA |