How do you extract a surface in AutoCAD?

How do I extract objects from my surface?

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  1. In the drawing, select the surface.
  2. Click TIN Surface tab >> Surface Tools panel >> Extract from Surface drop-down >> Extract Objects >> Find.
  3. The Extract Objects From Surface dialog box lists all of the surface properties that are visible in the currently selected surface style. …
  4. Click OK.

How do I extract a surface feature line?

Menu > Surfaces > Utilities > Extract Object From Surface. From here, use either the Major or Minor Contour ‘Select from Drawing’ option, and pick the contour that you need. Turn this polyline into a Feature Line: Menu > Grading > Create Feature Lines From Objects.

How do you grade a feature line?

Feature line grading involves creating a set of feature lines to define the graded region as surface breaklines, and then adjusting the elevation of key points to control the shape of the surface. This technique is ideal for wide, fairly flat areas, such as parking lots or building pads.

How do you create a surface from polylines in Civil 3D?

On the Prospector tab of the Toolspace, right-click on Surfaces and select >> Create Surface.

  1. Confirm that TIN surface is selected as Type.
  2. Select the desired Surface layer and Style.
  3. Click <> to close the Create Surface dialog box.
  4. On the Prospector tab of the Toolspace, expand the Surfaces node.

What is auto corridor feature line?

About Editing Corridor Feature Line Connections



By default, Autodesk Civil 3D joins all points with the same point code along a corridor baseline and displays them as feature lines. You can modify how points are connected when a point code is used multiple times at consecutive stations.

How do you join two feature lines in Civil 3D?

To Join Feature Lines

  1. Click Modify tab Edit Geometry panel Join Find.
  2. Select the feature line you want to join other lines to.
  3. Select the joining object or enter Multiple to make a selection of multiple feature lines, polylines, or 3D polylines.
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