oh dear....
http://www.civil3d.com/index.php/2006/09/more-on-ucs-vs-dview-in-civil-3d/
an excerpt....
Autodesk Civil 3D object data is always presented in AutoCAD World
Coordinate System coordinates.
For example, the alignment data in the Alignment Entities vista in the
Panorama window is listed in world coordinates.
In addition, the Autodesk Civil 3D transparent commands are based on the
AutoCAD World Coordinate System. However, when you create an object and have
an AutoCAD User Coordinate System (UCS) defined, the UCS is honored when you
specify locations, which means that an insertion point or a coordinate is
interpreted relative to the UCS.
Autodesk Civil 3D objects are not aligned with the UCS.
For example, labels can be oriented relative either to the current view, the
World Coordinate System, or the labeled object, depending on the Orientation
Reference setting, but they cannot be oriented to the UCS.
Similarly, objects, such as profiles, sections, and tables, cannot be
oriented to the current UCS.
For more information about AutoCAD World Coordinate Systems and AutoCAD User
Coordinate Systems, see AutoCAD Help.
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And I tried it. I labeled bearings, etc. on some parcels and alignments,
then I changed the UCS and the labels nor the mapchecks changed.
I also did another experiment. I imported a list of points. Then I changed
my UCS so that my Y axis was 45 degrees turned. I reimported the same list
of points from ascii. They came in at the exact same spot. So it is truly
using the World Coordinate System when dealing with Civil 3D objects.
In some respects, I think I would rather it react to the UCS. I think that
an appropriate use of the UCS would be a North rotation.
However, that takes my original fears off the table. UCS changes won't muck
with the Civil 3D data.
--
Dana Breig Probert, E.I.T.
Engineered Efficiency, Inc.
www.civil3d.com
www.eng-eff.com
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Civil 3D 2007 SP3
AMD Athlon 64 X2 Dual Core 2.01 GHz
2GB RAM, 256 MB ATI FireGL V5200
Intel Core 2 2.33GHz
2 GB RAM, 512 MB NVIDIA Quadro
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