"AS BUILT" cross sections

[MKH-VB]

surveyors have gone out an re-surveyed cross sections along a newly constructed road. I am wanting to compare these new cross sections to the ones that were included in the design plans.  in other words....put the new cross sections lines right on top of the design ones for comparison.  How would a guy do this? ANy help will be greatly appreciate.

MKH

[Jay_B]

One way to do it would be:

Create a surface of the As Built X sections, in Sample Line Group Properties, add the As Built Surface to the "sampled sources", then display them in section views.

[MKH-VB]

I need to revisit this situation.  My surveyor did not cross section close enough together to be able to model the topo. Is there way I can manually draw a sample line from node to node in the plan view, and then apply it to a cross section? Thanks again

[Jay_B]

Do you have a Corridor, Sample Lines and Section Views for the newly constructed road?

[MKH-VB]

yes. I did it the way you mentioned above, but there is too much distance between cross sections to model it. I need to be able to just draw a sample line from node to node. and then apply it to the xs

[Jay_B]

If the as built survey is incomplete, then your options are very limited for any meaningful comparison to the design.

[MKH-VB]

I wouldn't say it is incomplete. We just wanted to randomly check some cross sections. The sections are far enough apart that a model would not be accurate. They took 30 shots at sta 2+00, I just thought I could connect those shots, and then apply it to a section. You never know till you ask!  🙂 I appreciate the replies.

[Jay_B]

I have some ideas, but all are based on assumptions, without seeing a picture of the As built survey data, this is my best assumption.

If you have random station full x sections, which don't match up with the design sample line increment, then:

Create a surface of the as built surface, as-is, then create a new Sample Line Group, creating sample lines only at these As Built Sections & not the twilight zones in between as built xsec's.

Sample the following:

EG Surface

Corridor

Corridor Surfaces

As Built Surface

Create a new Section View Group of only the as built vs. design comparison stations.

Done.

[wfberry]

I am assuming you have it in a data file. (Data Collector)

Perhaps using the CREATE PROFILE FROM FILE .

Using these profiles drawn in a new file you could xref them into your main file and just manually drag the xref under each one of your cross sections to see how that compare.

Of course you need to have the Hor and Ver set the same.

Bill

[andrewpuller3811]

I have not used it personally, but you could try Section Maker from Civil Survey Solutions.

It looks like it does something similar to what you want.

http://civilsurveysolutions.com.au/component/content/article/57-evaluations/595-section-maker.html

[magid.rahimy]

Hello. You have few points for topo. Well, simple: Add the points you lack to the collection of points yourself. Extract its coordinates from the plan and internalize their height. Then export their coordinates. Now your points are a complete topo. You can overlay sections by creating different surfaces in civil3d.

[Neilw_05]

Jay B has the right idea. Either adjust your design sample lines to match the as built survey cross section lines OR copy the As Built survey cross sections to the nearest design sample line locations and project them onto your cross sections.