topic Re: reference contours elevation in Civil 3D Forum

reference contours elevation

Anonymous — Mon, 11 Jul 2016 11:21:28 GMT

Dear Autodesk Community,

here I have an issue.

I've my contours which show label with the correct elevation, but in the property prospector the elevation is not the correct one.

Eg in the screenshot below the contour selected has a label of 1986.1 m (correct) but in the prospector the elevation showed is -2.4311 m.

Look like the elevation reference is set to a relative value and not to sea level.

Is there any option to set a new elevation reference and adjust the elevation of each polyline according to the label?

attached DWG

Many thanks In advance.

Marcello

Re: reference contours elevation

Anonymous — Mon, 11 Jul 2016 11:42:42 GMT

If you check the properties of the contours you will see that they are not at the labeled elevation, but at some negative number. You will have to move them all to the correct elevation.

Note that the labels are not true surface contour labels, but just pieces of text enclosed in a border. This may not matter to you, but you should be aware of what you are looking at.

Re: reference contours elevation

Jay_B — Mon, 11 Jul 2016 11:44:37 GMT

If the X & Y values are correct and you wish to correct the Z value of the 3D polylines to match the annotation values use the MOVE command.

(I have no way of knowing if there could be a scaling issue in the X & Y directions.)

Command: M
MOVE
Select objects: all
543 found

Select objects:
Specify base point or [Displacement] <Displacement>: 0,0,0

Specify second point or <use first point as displacement>: 0,0,1988.5311

Now the 3d polylines will be at their correct elevations.

Next, Rebuild Surface 1 and Surface 1 will be updated to the proper elevations.

Re: reference contours elevation

Anonymous — Mon, 11 Jul 2016 12:46:22 GMT

Thanks Jay_B.

I fixed using your solution!

Marcello