ALIGNMENT command
Creates Horizontal and 3D alignments.
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Description
Creates Horizontal and 3D alignments to represent a reference system used to position linear objects in space.
Note: You can offset Horizontal Alignments. The result of the OFFSET command on Horizontal Alignments is a non-associative polyline.
Horizontal Alignment is created by specifying points of intersection (PI) of the tangent polygon. Curves are drawn automatically between the tangents.
Note: The DEFAULTCURVETYPEHA system variable specifies the curve type to be used when create a new horizontal alignment or adding new PI. The default value is Auto Spiral-Curve-Spiral.
Options within the command
- Select TIN surface
- Allows you to select a TIN surface used to drape Horizontal alignment and to create 3D alignment.Note: Two 3D alignments are created: one represents the projection of the Horizontal Alignment to the TIN Surface and second represents the Vertical Alignment, which is calculated based on the Vertical tolerance parameter.
- Pick pi point
- Allows you to pick the PI points for your Horizontal alignment.Note: If Select TIN surface option was previously selected, the 3D alignment is automatically generated.
- Undo
- Undoes the last PI point.
- Specify start station
- Allows you to define the start station when start creating a new alignment.