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Is there a way to draw an arc using point entities with z values.

- casual22
**Posts:**14**Joined:**Tue Mar 08, 2005 5:48 am**Location:**Berlin. NJ

Arcs are 2D entities so require a 2D point to be used for all picks.

If you do a 3 Point Inverse in COGO the elevations are ignored and the arc is 2D.

If you draw an arc rather than calculating it, and you need to pick points that are in 3D, the only trick I can suggest i to use the ".xy" filter on each pick.

It would be entered like this:

: arc

Center/<Start of arc>: .xy

Select XY of: <-pick the point

Still need Z of: 0

Angle/Center/Direction/End/Radius/<Second point>: .xy

Select XY of: <-pick the point

Still need Z of: 0

End point: .xy

Select XY of: <-pick the point

Still need Z of: 0

This would draw the arc using the 3 points picked, filtering the Z and using the value of 0 for each pick.

BOLD text is what you would need to type

ITALIC text shows you that you have to pick a location on screen (you may need to use Entitiy Snaps when picking)

Cheers,

If you do a 3 Point Inverse in COGO the elevations are ignored and the arc is 2D.

If you draw an arc rather than calculating it, and you need to pick points that are in 3D, the only trick I can suggest i to use the ".xy" filter on each pick.

It would be entered like this:

: arc

Center/<Start of arc>: .xy

Select XY of: <-pick the point

Still need Z of: 0

Angle/Center/Direction/End/Radius/<Second point>: .xy

Select XY of: <-pick the point

Still need Z of: 0

End point: .xy

Select XY of: <-pick the point

Still need Z of: 0

This would draw the arc using the 3 points picked, filtering the Z and using the value of 0 for each pick.

BOLD text is what you would need to type

ITALIC text shows you that you have to pick a location on screen (you may need to use Entitiy Snaps when picking)

Cheers,

Glen W. Cameron, C.E.T.

City of North Bay, Ontario

City of North Bay, Ontario

- Glen Cameron
**Posts:**1395**Joined:**Fri Nov 08, 2002 12:18 pm**Location:**Corbeil, Ontario, Canada

Thanks John - I forgot about that command!

Cheers,

Cheers,

Glen W. Cameron, C.E.T.

City of North Bay, Ontario

City of North Bay, Ontario

- Glen Cameron
**Posts:**1395**Joined:**Fri Nov 08, 2002 12:18 pm**Location:**Corbeil, Ontario, Canada

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