Exercise 1: Creating Feature Lines

In this exercise, you will use two different methods to create feature lines.

Feature lines can be either drawn with straight and curved feature line segments, or created from existing alignments or AutoCAD lines, arcs, polylines, or 3D polylines.

A feature line can be used as a grading baseline, but not as a target.

This exercise continues from the Setting Up Grading Standards tutorial.

Create feature lines from AutoCAD objects

Note:

This exercise uses Grading-1.dwg with the modifications you made in the previous tutorial, or you can open Grading-2.dwg from the tutorials drawings folder.

1. Click Home tab Draw panel Create Line Find. Draw a line from circle A to B to C.
2. Click Home tab Create Design panel Feature Line drop-down Create Feature Lines From Objects Find.
3. Click both lines, then right-click and click Enter to end the selection.

   In the Create Feature Lines dialog box, notice that you can assign a name to the feature lines as they are created. Naming significant feature lines can make it easier to assign targets when creating a corridor. For this exercise, you will assign names after the feature lines have been created. Following this workflow enables you to create many feature lines at the same time, but name only the most significant feature lines.

4. In the Create Feature Lines dialog box, click OK.

   The lines are converted to feature lines and added to Site 1. You will assign elevation values to these feature lines later in this exercise. Next, you will draw a feature line and specify elevations along the line.

Name the feature lines

1. In the drawing, select feature lines AB and BC. Right-click. Click Apply Feature Line Names.
2. In the Apply Feature Line Names dialog box, click .
3. In the Name Template dialog box, for Property Fields, select Next Counter. Click Insert. Click OK.
4. In the Apply Feature Line Names dialog box, place the cursor at the beginning of the Name field. Enter ABC.

   The Name field should contain ABC <[Next Counter]>.

   ClickOK.
5. In Toolspace, on the Prospector tab, expand SitesSite 1. Select the Feature Lines collection.

   Notice that the two feature lines and their names are displayed in the Prospector list view.

   Next, you will draw a feature line and specify elevations along the line.

Draw a feature line

1. Click Home tab Create Design panel Feature Line drop-down Create Feature Line Find.
2. In the Create Feature Lines dialog box, specify the following parameters:
   • Name Check Box: Selected
   • Name: CDEF <[Next Counter]>
   • Style Check Box: Selected
   • Style: Ditch
3. In the Create Feature Lines dialog box, click OK.
4. In the drawing window, snap to the end of the feature line inside circle C. When prompted, enter 688.00 as the elevation.

   You have entered a known value for the starting elevation. In the following steps, you will use the transition command to defer entering elevation values at intermediate points along the feature line.

5. Stretch the feature line and click inside circle D. When prompted for an elevation, enter T.
6. Stretch the feature line and click inside circle E. When prompted for an elevation, press Enter to accept Transition.
7. Stretch the feature line and click inside circle F. When prompted for a transition, enter SU to use the elevation of the surface at that point.
8. Note the surface elevation shown at the command line. Press Enter twice to accept the elevation and end the command.
9. In Toolspace, on the Prospector tab, expand SitesSite 1. Select the Feature Lines collection.

   Notice that the three feature lines you created are displayed in the list view. You can use this box to edit the feature lines’ name, style, and layer, and view other properties of all the feature lines.

To continue this tutorial, go to Exercise 2: Assigning Feature Line Elevations.