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I'm a bit perpplexed about a very simple grading scenario: intersect the daylighting of two gradings as shown in the screen capture. I would like a solution that is dynamic to changes in either of the 2 gradings.
The intended result is in the 3D PDF.
Neil Wilson (a.k.a. neilw) AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1 WIN 10 64 PRO
I dont understand the overlap of the two. Could you giv a bit more detail?
Joe Bouza Did you find this post helpful? Feel free to Like this post. Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.
The problem I have is if I create the intermediate surfaces to use as targets, I can't get them to clean up to form the intersection as shown in the PDF. I can get the road to match the ditch or the ditch to match the road but not both. Ultimately both the ditch and the road need to be pasted into a final finished surface.
The only solution I can come up with is to explode the gradings and manually trim out the featurelines to get the desired result. On a project where this type of intersection occurs frequently that is not a practical solution.
If someone can put together a simple example to show how it works it might help.
Neil Wilson (a.k.a. neilw) AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1 WIN 10 64 PRO
Iam sorry. I guess I don't get it then. Getting multple grading objects to interact is a constant struggle for me.. Now this it's not a solution, but I always end up extracting my proposed grading contours to it own drawing & then clean up the polylines using the mapclean function and makes tweaks such as filleting the polyline contours to make the look pretty. Any contours that Civil 3D creates, beyond a simple corridor or grading object pad, never passes our quality control for how a grading plan should look. Too many jagged lines & weird breaks.
Perhaps it's not clear from the explanation. In order for the gradings to have a solution the ditch and the road have to overlap. Therein lies the problem. I don't know how to clean up the overlap using the intermediate surface approach.
Neil Wilson (a.k.a. neilw) AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1 WIN 10 64 PRO
Well I'm feeling a bit foolish. The solution is simple. Using an intermediate surface that includes the EG and the ditch as a target for the road, I establish the match between the road and ditch. Then in the FG surface I first paste the ditch, then the road. The road wipes out the ditch overlap leaving a perfect seam. No need for the 2nd intermediate surface.
Sorry for the confusion.
Neil Wilson (a.k.a. neilw) AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1 WIN 10 64 PRO
If the issue is simply getting two gradings to interact. Civil 3D will not interact gradings unless they are of the same Site. This works much in the same fashion that feature lines work, in that feature lines within a common Site will interact with each other, while feature lines in seperate Sites will not interact.
In order to create a link in the gradings between your ditch and road, create both in the same Site, and Civil 3D will automatically merge the two.
Interacting the gradings is not the answer for the reason I tried to explain. There is no simple way I can see to get the 2 gradings to cleanup precisely. I think it will require using intersectiing surfaces.
If you have a dataset can you run through the exercise and present the workflow? It shouldn't take much time. If you do, please use a skewed ditch relative to the roadway for a realistic scenario.
Neil Wilson (a.k.a. neilw) AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1 WIN 10 64 PRO
I started sketching your scenario and had a thought: Maybe the intersection wizard could help?
Joe Bouza Did you find this post helpful? Feel free to Like this post. Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.
A little tip to help keep things simple and in order.
When I create compostite surfaces I name them as below.
EG1
Corridor 1 - TOP
COMP1 - EG1 with Cord 1 TOp Pond1 - (this uses COMP1 as its EG surface)
COMP2 - COMP1 with Pond1
Parkinglot 1 - (This uses COMP2 as it EG surface)
COMP3 - COMP2 with Parkinglot 1
ETC
I've seen projects with up to 9 composite surfaces all working in full harmony! Also a prime example of when to use data shortcuts, just make sure to toggle the rebuild Automatic for all above surfaces. Also make note that you can also do some simple edits to each of these comp surfaces if required to get them to look proper. i.e. swap edge
That does make sense. No need to feel foolish.
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