Hi Bernd,

I just tried this and got 180 and 360 degrees,
depending on N or S direction. With G8 set to a
10 degree field, the measurements usually varied
plus/minus 0.1 degree. With G8 set to a 15'
field for better accuracy, the measurements were
always dead on. I tried all three projections
with no difference. I'm in the US, and used the
Eastern borders of Utah and Arizona, which fall
on the same parallel of longitude. Can't think of anything else to check.

Larry

At 01:05 AM 1/29/2007, you wrote:

>Hello Bill,
>
>I just discovered the following:
>When measuring in geomode (right click and move the mouse) the position
>angle is always about 8 degrees to small (e.g. 352° when measuring a vertical
>line up (north), 172° when measuring due south (should be 180°)). There is no
>difference wether I measure in the center of the
>image or at the right or left
>border. I measured in the north western part of germany (8 deg east, 52 deg
>north) with a field size of 1 deg. The projection is stereographic.
>
>Is this a bug or do I misinterpred the meaning
>of the displayed PA? What is the
>reference, geographic north or something else?
>
>Clear skies
>Bernd
>
>Bernd Brinkmann
>
>Sternwarte Herne, MPC code A18
>Herne, Germany
>
>e-mail: <mailto:info%40sternwarte-herne.de>info@...
>http://www.sternwarte-herne.de
>

Laren Dart
http://ldart.got.net


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