Projecting two vertical profiles onto a line

RE: Projecting two vertical profiles onto a line

Derek Schmidt — Wed, 01 Jun 2016 14:02:21 GMT

Actually I should mention a caveat for the solution above. If you make only two offset copies and use only those two copies in the terrain, that suggests that you're working with a plane. If your profile is in a curve, this wouldn't be a very good solution.

It might be better to start with a line that represents each typical lane line complete with elevation, and then project from each of those lane lines to the centerline of the median. Then take your terrain model from that.

RE: Projecting two vertical profiles onto a line

Joel Graff — Wed, 01 Jun 2016 12:41:34 GMT

I had actually begun formulating a similar solution as I was posting this. Was hoping for a better answer, but your workflow looks like the thing to do.

So far as projecting orthogonal to an element, I've tried that tool. Again, it doesn't help because I'd have to project from two separate elements onto the same profile since I'd want both slopes to be adjustable. The other option would be to project from one element and integrate that projection with the intersection of the other element's profile, but I can't imagine any way to get that done.

Thanks.

RE: Projecting two vertical profiles onto a line

Derek Schmidt — Tue, 31 May 2016 21:01:31 GMT

Ok, so what you want is to project the cross-slope profile (the horizontal line in your image) in a way that the semicircles will pick up the elevation.

Here's a workflow suggestion:

Since you already have one cross-slope line with profile, do a single offset copy to the north and south so that the entire island is between these lines.
Project the cross-slope profile to each of the new offset copies.
Make a construction-level terrain model of just the two offset copies.
Profile the semicircles from this terrain model.

For the record, the reason you can't do it the way you expect to work is that the project profile tool projects from the source element to the target element where the source element has an address from the target element. (I do have some vague memory that there is some profile projection tool that allows you to project perpendicularly from the source, which would work perfectly for your expected workflow which is far simpler than creating a terrain model.)