From the course: AutoCAD Civil 3D: Topographic and Boundary Survey

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Surface boundaries

Surface boundaries - AutoCAD Civil 3D Tutorial

From the course: AutoCAD Civil 3D: Topographic and Boundary Survey

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Surface boundaries

- [Instructor] Now let's look at surface boundaries. By default, once the service has been triangulated, Civil 3D will build a boundary just based on the limits. But we know based on the information that we've added here, that all of these region should actually not be included in the surface. So let's look at the best way of building a boundary for the surface. First what I'll do is just start with some information that we already have. So I could go around and draw a Polyline that shows the limits that I want for this boundary. But since Civil 3D has already basically created that for me, and I just need to make that adjustments, I'm going to extract this boundary from the surface as a Polyline and then use that as my new boundary. To do that, I'll select the surface. And on the context sensitive ribbon, I'll come to extract from surface. When I click the drop-down arrow, I'll go to extract objects. Now any of the object that are on display in the surface style, we have the option…

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