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Re: Historical charts and mapping
From: Brad Morris
Date: 2016 Aug 21, 21:40 -0400

Correction to my earlier post. I stated that 1 second of arc was 2 feet of displacement. That is wrong.

1 minute of arc is a nautical mile
A nautical mile is ~ 6076 feet
6076/60 ~ 101.27 feet.

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