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Wed, 18 Aug 1999 08:25:25 -0400 |
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---------- Forwarded message ----------
Date: Tue, 17 Aug 1999 19:09:37 -0600
From: bob Wier <[log in to unmask]>
To: Maps and Air Photo Systems Forum <[log in to unmask]>
Subject: Re: Compass rose question (fwd)
>The "backwards" compass rose on some surveying compasses is associated with
>the way the compass is used. In the case here, the wooden box is opened and
>the compass held with the line on the inside top of the box, which aligns
>with "N" & "S" (adjusted for declination) pointing in the direction of the
>line of interest. The compass needle points to the correct reading if the
>compass rose is "reversed".
>
Very true. I have a "Brunton" Cadet plastic case "Pocket Surveying
Compass" here on my desk (I can't afford the metal cased model), which
has E and W reversed as you hold the compass at eye level, sighting on
an object, and read the bearings in a mirror lined up with a "gunsight
notch".
Brunton for many years has been a leading name in such devices (located
in Riverton, Wyoming).
THANKS
--Bob Wier
mailto:[log in to unmask]
7:08 PM Tuesday, August 17, 1999
Unix/Internet Systems Administrator
Rocky Mountain College, Billings, MT
(currently in Ouray, Colorado)
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