Arc Degree of Curvature in Alignment Label

[cdg-desirea]

Can someone tell me how to get the arc degree of curvature to label in my alignment curve information? I don't see it as an option.

Desi
C3D 2008

[Civil3DReminders_com]

Expression, D=(360)(100)/2piR

You may want to check the formula to see if it matches what you are looking for.

Christopher
http://civil-3d.blogspot.com/

[cdg-desirea]

I get a "parse error" when I try to do this expression.

[Civil3DReminders_com]

I didn't put the actual expression in the post, just the formula. I did go and create the expression for both formulas that I found in this location:
http://fredbobchris.googlepages.com/intermittentblockoftheday with the date of 04-04-2008.

It looks like Civil 3D doesn't like to divide the Radius, so that's why there is more than 2 formulas.

Christopher
http://civil-3d.blogspot.com/

[Anonymous]

Christopher,
I found that if I calc pi instead of using the built-in pi, I get correct
results. Also, this method must be converted back to radians (yours does,
too):

DEG2RAD(100.0 * (180.0/(Radius*(4 * ATAN(1.0)))))

Using this correctly displays a 200.00' radius curve to have a DOC(Roadway)
of 28d38'52.

If I use this: DEG2RAD(100.0 * (180.0/(Radius * pi))) I get this as a result
for the same curve: 17d41'02"

So I think it's the pi that doesn't get used correctly.

The 2 versions you found are for Railway Curves (100' chord) and Roadway
Curves (100' Arc)


"ChristopherF" wrote in message news:5895977@discussion.autodesk.com...
I didn't put the actual expression in the post, just the formula. I did go
and create the expression for both formulas that I found in this location:
http://fredbobchris.googlepages.com/intermittentblockoftheday with the date
of 04-04-2008.

It looks like Civil 3D doesn't like to divide the Radius, so that's why
there is more than 2 formulas.

Christopher
http://civil-3d.blogspot.com/

[Civil3DReminders_com]

The values I was getting for the railroad degree of curvature matched my source, since they where showing the results in radians, so I didn't bother to check to see if the Deg2Rad was an issue. I didn't have a source to check the roadway one, otherwise I would have included the Deg2Rad issue.

Who uses Radians anyways and why would that be the default?

Christopher
http://civil-3d.blogspot.com/