Edit elevations for feature lines

00:05

In this video, we're going to again talk about editing feature lines,

00:09

but this time we're going to talk about editing elevation information for feature lines.

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So just as we did in the last video for horizontal alignments,

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we're going to go ahead and go to the feature line that we have created along this property boundary.

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I'm going to select it and in the contextual ribbon bar, next to the Edit Geometry, we have Edit Elevations.

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So inside of the Edit Elevations command, you have the options for elevation editor,

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and elevation editor gives you all of the information on your current feature line, what the station is at a specific point,

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what the elevation is at that specific point, and then what the length is to the next point, and then what the grade ahead is to that point.

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And then when you're on another point, it will give you the information for the grade back to the previous point.

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Right now we only have two points.

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So this isn't providing much great information for us,

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other than the fact to notify us that both of our points in this feature line so far are at elevation 0.

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Moving on from here, you can insert additional elevation points or delete elevation points using these two commands here,

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and then we get into the more nuanced commands.

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One of my favorite commands that I have inside of Civil 3D is to drape feature lines across the surface.

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So this command right here Elevations from Surface, what it effectively does is when your feature line crosses a TIN line,

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it will assign an elevation to your feature line based on what the elevation of that TIN line is.

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So what I can go ahead and do is I can select Elevations from Surface.

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It will ask me, what surface I want to base my elevations on?

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I'm going to go ahead and tell it EG.

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I am going to insert intermediate grade breakpoints because that is basically where my feature line crosses a TIN line.

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And then I am going to hit "OK".

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I could do it relative to the surface and say, give it a plus or minus relativity to the surface,

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but I'm going to go ahead and just drape it directly onto the surface.

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So I'm going to click "OK".

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And then I'm going to select my feature line,

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and it's showing me all the circles are new elevation points that are going to be added to my feature line.

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So I'm going to go ahead and hit "Enter".

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And now if I go to the Elevation Editor, what you'll see is I have a lot more data in here.

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It has basically every station that one of those dots was added to and what elevation that dot was added at.

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And it has also modified my 0+0 station and my final station to be on the elevation of my surface.

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So that's why I like this command the most.

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It's very robust, it helps with creating feature lines, for creating match lines,

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or for creating boundaries for a new surface that I want to have interact with an old surface.

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But moving on from here, what you have in here is you have Quick Elevation Edit.

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So you can basically move along the line and choose either a specific elevation on a point,

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as you can see I'm hovering near a point and it gives me a circle, that is saying you can click there and then modify that elevation.

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Or it's giving me an arrow that I can choose which direction I want to modify the grade between points.

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So that is great because it's a quick way to edit elevations as you move along the line.

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Then we move on to the Edit Elevations, where we're basically going to choose elevations and basically move along the line at each individual point.

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Then we move on to the next, which is set grade/slope between points.

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So what it's going to do is it's going to say specify your start point and then your end point, and it's going to ask you,

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so you can edit the grade or the gradient between multiple points or just two points together.

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So I could select this point and then it says, specify elevation, I can accept the current elevation.

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And then I can move along and I can set a constant grade between any of these points, as I see fit.

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So I'm go ahead and hit "Escape".

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And we move on to the next point, which is insert high/low elevation point.

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This is important because basically you can decide what elevation you want to be a high point for your feature line.

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So I can set that point and then I can specify the end point.

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I can specify that end point and then I can specify a grade ahead, let's say 23.

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And then I can specify grade back, I can say 15.

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And then we'll insert high or low point based on those gradients.

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So moving on from there, we can go ahead and look at our raise and lower by reference,

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which will basically raise and lower that feature line based on a certain reference.

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Set elevations, you can set a specific elevation based on a reference.

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You can get adjacent elevations by reference.

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You can also extend grades and then you can raise and lower the entire feature line based on a specific call.

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So moving on from here, what I'm going to go ahead and do is I'm going to delete out some of these elevation points.

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Delete out the intermediary elevation points in here.

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And then what I'm going to do is I'm going to insert an elevation point somewhere close to this contour right here.

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I know that that contour is around 190, so I'm going to say 190 for that elevation.

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And then I'm going to insert another point.

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And I'm going to do it at this contour over here and I am going to give it an elevation of 190.

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And so what you'll see happen now is when I look at my feature line and I go to the Elevation Editor,

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you will see that I have starting at 0+00, which is over here.

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I move with elevations until I get to my 190 here and then I have another 190 point, which is on the other side of here.

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So this whole line segment between here and here will be at 190 and then the rest of the information is draped on the surface.