Bill, Vlietstra & USMA list:
I have seen several members discussing the need for exact Earth dimensions.
Please see:
http://home.online.no/~sigurdhu/WGS84_Eng.html
24,901.55 miles
equal 40075.1600832 km
I have expressed the need to redefine METRE as: 1/10^5th of arcAngle Pi/180
(1-degree), to fulfill the need that can link Time unit (36% of SI-second)
via this Length unit, as at: http://www.brijvij.com/clockface-n-earth.doc
ORIGINALLY I attempted to define 'New Metre via the time interval at the
value for velocity of light' in my contribution: The Metric Second; V25 N4;
1973 April published through Bureau of Indian Standards, New Delhi.
Regards,
Brij Bhushan Vij
(MJD 2454102)/630+D-001 G (Monday, 2007 January 01 H(decimal) IST
Aa Nau Bhadra Kritvo Yantu Vishwatah -Rg Veda
Jan:31; Feb:29; Mar:31; Apr:30; May:31; Jun:30
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(365th day of Year is World Day)
HOME PAGE: http://www.brijvij.com/
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From: "Martin Vlietstra" <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: "U.S. Metric Association" <[email protected]>
Subject: [USMA:38085] Re: Map Scale
Date: Tue, 6 Mar 2007 19:56:59 -0000
Jeppsons appear to have missed the obvious answer. If the maps are
designed for use by aviators and the maps only display units of measure
that are used by aviators on the grounds that additional units would
compromise safety, then I would reluctantly agree that they have a case.
However the case that they put is a load of rubbish.
----- Original Message -----
From: Bill Hooper
To: U.S. Metric Association
Sent: Tuesday, March 06, 2007 4:37 AM
Subject: [USMA:38082] Re: Map Scale
On 2007 Mar 5 , at 10:47 PM, Pierre Abbat wrote:
I found the figure of 24,901.55 miles for the equatorial
You should know this in metric,
I DO know it
that figure (the equatorial circumference of the Earth) in metric, to
the nearest megametre. That wasn't the problem here. I was trying to trace
the reasoning from the given data which started with miles and nautical
miles.
But, even if I had wanted to start with metres (or megametres), the
precision with which the information was given required a more precise
value of the Earth's equatorial circumference than is provided by the old
approximate 40,000 km (or 40 Mm). The more precisely known value is
40,075.16 km which can be found on the same web page where I got the figure
of 29,901.55 miles.
Regards,
Bill Hooper
Fernandina Beach, Florida, USA
==========================
SImplification Begins With SI.
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