# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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Re: Pear shaped Earth
From: Bill Noyce
Date: 2002 Oct 2, 09:03 -0400

```I don't think Peter's quite right here.  Rather, I would conclude
that the average length of a degree of latitude is 59.71 miles
between 0 and 10 degrees, and (5400.6-4797.6)/10=60.30 miles between
80 and 90 degrees.  To the precision I'm likely to work in, these
are all equal to 60 degrees...
-- Bill

-----Original Message-----
From: Peter Fogg [mailto:ffive@TPG.COM.AU]
Sent: Wednesday, October 02, 2002 2:28 AM
Subject: Re: Pear shaped Earth

David Weilacher wrote:

> Can anyone give me a numerical representation of the shape of earth?  I'm
> thinking something like the length of a line of latitude for each 10 degrees
> north and south of the equator.

I'm told that Meridional Distances do indicate this:

10 d lat  597.11
20        1194.58
30        1792.72
40        2391.75
50        2991.82
60        3592.91
70        4194.91
80        4797.59
90        5400.63

so, if I've understood correctly, a degree at 10d of lat.is 59.71 nm, and a
degree at 90d of lat. is 60.007 nm.

```
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