Defining an Alignment from Objects

AutoCAD Land Desktop Tutorial

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Defining an Alignment from Objects

In this exercise, you will define the second alignment from individual objects.

  1. On the View menu, click Named Views to display the View dialog box. Under Name, select 2, click Set Current, and then click OK.

  2. From the Layer list, turn on the CL-2 layer.

    The yellow alignment on the CL-2 layer now appears in the drawing. This alignment is comprised of connected alignment objects. Define a second alignment from these objects, starting with the right end of the alignment.

  3. On the Alignments menu, click Define from Objects.

  4. Select the right end of the first tangent on the right end of the alignment.

    A red X appears at the starting point of the alignment.

  5. Use a window selection set to select the rest of the entities in the alignment, and then press ENTER.

    Use the following steps to specify a reference point at the center of an existing circle positioned on the alignment, and then specify a reference station value.

  6. At the Select Reference Point prompt on the command line, enter '-VIEW (apostrophe dash VIEW), R for the Restore option, and then 3 for the view to restore.

  7. Use a Center Osnap to select the center of the circle as the reference point, and then enter 15778.63 for the Reference station value.

  8. Press ENTER to display the Define Alignment dialog box.

  9. Enter A2 for the Alignment name and Alignment #2 - Highway 69 for the Description.

  10. Accept the Starting station value of 15299.008, and then click OK to continue.

  11. On the View menu, click Named Views to display the View dialog box. Under Name, select 2, click Set Current, and then click OK.

The second alignment is defined from objects.

Click here to see an illustration of the A2 alignment.