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Sender:	"Maps, Air Photo & Geospatial Systems Forum" <[log in to unmask]>
Subject:	Re: converting a verbal scale statement -- help needed!
From:	Maps-L Moderator <[log in to unmask]>
Date:	Thu, 18 Dec 2008 14:26:56 -0600
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-------- Original Message --------
Subject:        Re: converting a verbal scale statement -- help needed!
Date:   Thu, 18 Dec 2008 19:28:18 GMT
From:   [log in to unmask] <[log in to unmask]>
To:     [log in to unmask]



http://www.kb.nl/skd/mathemat.html

has one sea-league = 3 nautical miles
1 nautical mile = 1854.965 meters (actually NIST says 1852 m).
                = 60 per degree.

GRS1980 has equatorial radius = 6378137 m.
That would make one minute of arc along equator = 1855.325 m.

Clarke 1866 has equatorial radius = 6378206.4 m.
That would make one minute of arc along equator = 1855.345 m.

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