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

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Working with different data sources

Working with different data sources - AutoCAD Civil 3D Tutorial

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

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Working with different data sources

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- [Narrator] We've looked at building civil 3D surfaces from points and break lines, or survey figures. Now let's look at using AutoCAD drawing objects to do the same. The first thing to remember about drawing objects in a surface is that they're not going to have a live connection to the surface. So using civil 3D cogo points if we change one of those points the surface would recognize that there's been a change in that information and it would request that we update and rebuild the surface. In this case if I make a change to one of these points that's displayed on the screen after it has been added to the surface we won't have the ability just to update the surface and reflect the changes. We would actually have to remove the data from the surface and then add back the new information. So let's start by isolating the layer that the points are on. I'll select a single point, and on the layers panel I'll choose isolate. I'm going to zoom out a little bit more so it'll be easy to make…

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