You can select a parcel lot line or feature line as the grading footprint.
A feature line is a special type of line that grading commands recognize and use as a footprint.
A feature line represents an object in the drawing from which you want to grade, such as a swale or a ridge line. You can draw feature lines, create them by converting existing objects, or export feature lines from corridors. Surfaces can use a feature line as a breakline.
Unlike 3D polylines, feature lines support arcs without tessellation . Tessellation is undesirable in a grading footprint because it results in many small grading faces joined by radial corners. To avoid tessellation, you can create a feature line from a 2D polyline with arcs, and then apply elevations using theGrading Elevation Editor. If you want to create a grading from a footprint that has tessellated curves, you can use the Fit Curve command to convert the tessellation to true arcs.
See Also
Topics in this section
- Creating Feature Lines from Objects
You can create a feature line by converting existing 2D or 3D polylines, lines, or arcs. You can select objects in the current drawing or from an Xref.
- Assigning Elevations to a Feature Line During Creation
When creating a feature line you can manually enter an elevation or assign an elevation from a surface or from grading objects when creating a feature line from objects.
- Creating Feature Lines from Alignments
You can create a feature line from an alignment, and use this feature line to grade from the alignment geometry.
- Applying Feature Line Names
Apply optional names to feature lines to distinguish significant feature lines.
- Applying Feature Line Styles
Apply a style to a selected set of feature lines.
- Editing Feature Line Styles
Apply a style to a selected set of feature lines.
- Removing Dynamic Links
Remove the dynamic links from grading feature lines that have been created from alignments or corridors.
- Selecting All Feature Lines in a Site
Make a selection set of all feature lines in the current site and edit them all simultaneously. The same command also displays the Toolspace List View.
- Selecting All Grading Groups in a Site
Make a selection set of all grading groups in the current site. The same command is useful for visualizing the gradings in the object viewer. This command also displays the Toolspace List View.
- Drawing Feature Lines
Draws feature line segments.