Re: Longitude/Latitude of the Great Voyages Paths over the Globe
- From: oriel36 <kelleher.gerald@xxxxxxxxx>
- Date: Mon, 09 Jul 2007 19:46:26 -0000
On Jul 9, 5:29 am, humberto.bortolo...@xxxxxxxxx wrote:
Greetings!
Could you help me? I'm looking for geographical coordinates (latitude/
longitude) of the paths used in the Great Voyages (made by Columbus,
Magellan, etc). Indeed, I'm trying to build a 3D version of pictures
like that:http://commons.wikimedia.org/wiki/Image:Magellan's_voyage_PL.svg
Thanks in advance, Humberto.
The Great vogages indeed !,we have cartographers here who cannot make
the simple correlation known to all navigators for centuries,the
simple correlation which keeps clocks in sync with the axial cycle in
24 hours/360 degrees .
The great Huygens lays out the principles which uses the natural
inequalities in the noon cycle and equalises them to the 24 hour cycle
-
http://www.xs4all.nl/~adcs/Huygens/06/kort-E.html
The heliocentric astronomers took advantage of the Equation of Time
correction by transfering the 'average' 24 hour cycle to a 'constant'
axial cycle insofar as the 24 hours days of Monday elapse into the 24
hours of Tuesday,these brilliant men used the Equation of Time to keep
the correlation between the standard pace of a clock and terrestrial
longitudes as 4 minutes for each degree of geographical seperation.
Now the really distasteful news.Cartographers go along with a hopeless
modern version which believes that the noon cycles are 24 hours
exactly in order to justify the axial rotation to a distant star in 23
hours 56 minutes 04 seconds -
http://en.wikipedia.org/wiki/Image:Tiempo_sid%C3%A9reo.en.png
Maybe you would like the Nasa version -
'Period Of Rotation'
"The actual value is 23 hours, 56 minutes and 4 seconds. This is the
length of a "sidereal" day. It is the actual time it takes the Earth
to rotate 360 degrees. The term "sidereal" (pronounced sigh-dear'-
real) refers to the rotation of the Earth being measured relative to
the stars. There ARE 24 hours in a "solar day". This is the time it
takes from one noon (sun overhead) to the next noon. The difference in
the two "days" arises from the fact that during a day the Earth also
travels nearly a degree further on its yearly trek around the Sun. "
http://liftoff.msfc.nasa.gov/academy/rocket_sci/orbmech/period.html
Looking at the treatise of Huygens which shows how to determine
longitudes using the correlation between clock,the axial noon cycle
and the Equation of Time correction is a great journey in itself but
nobody here has chosen to take it.
.
- References:
- Longitude/Latitude of the Great Voyages Paths over the Globe
- From: humberto . bortolossi
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