Use the Best Fit Entities commands to use a series of AutoCAD Civil 3D points, AutoCAD points, existing entities, or clicks on screen as a basis to create AutoCAD lines, arcs, and parabolas.
The best fit commands are useful when you have to resurvey existing infrastructure during rehabilitation projects. In these cases, survey data may not match the original design. This requires you to edit the lines and curves in your design to best represent the actual survey data.
The best fit commands use the least square regression model to create lines, arcs, and parabolas from AutoCAD Civil 3D points, AutoCAD points, clicks on screen, or existing entities such as lines, arcs, polylines, feature lines, etc. The line or curve that best fits through these objects represents the minimum deviation from the original design.
When using the best fit commands for profile design, use the Create Parabola command for vertical curves. See Vertical Curve Design for more information.
Topics in this section
- Creating Lines by Best Fit
Use the create line by best fit command to use a series of AutoCAD Civil 3D points, AutoCAD points, existing entities, or clicks on screen as a basis to create an AutoCAD line.
- Creating Arcs by Best Fit
Use the create arc by best fit command to use a series of AutoCAD Civil 3D points, AutoCAD points, existing entities, or clicks on screen as a basis to create an AutoCAD arc.
- Creating Parabolas by Best Fit
Use the create parabola by best fit command to use a series of AutoCAD Civil 3D points, AutoCAD points, existing entities, or clicks on screen as a basis to create an AutoCAD parabola.