To Create an Alignment by Best Fit

1. Click Home tabCreate Design panelAlignment drop-down Create Best Fit Alignment Find.
2. In the Create Best Fit Alignment dialog box, under Input Data, specify the type of data from which to create the best fit alignment.
3. Next to Path 1, click .
   Note: If you selected COGO Points as the Input Type, you can use a drop-down list to select a point group.
4. In the drawing, select the objects from which you want to create the best fit alignment. Press Enter.
   Note: You may only select objects that are the input type you selected in Step 2. You may not select multiple types of objects.
5. If you wish to create the best fit alignment between two paths of objects, next to Path 2, click .
6. In the drawing, select the objects from which you want to create the best fit alignment. Press Enter.
7. If you chose either Feature Lines or AutoCAD Entities as the Input Data, click Weeding Options.
8. In the Best Fit Alignment Weeding Options dialog box, specify whether to either weed extraneous vertices or insert intermediate vertices. Click OK.
9. Under Best Fit Options, specify the following parameters:
   • Maximum Radius For Curve Detection—Specifies the largest acceptable radius of curves that are created from the input data.
     Note: This value is an estimate. For best results, specify a value that is slightly greater than the largest known radius in the input data.
   • Create Spirals—Specifies that spirals are created between the alignment tangents and curves. The spirals on either side of a curve are symmetric unless the match tangents option is selected.
     Note: When this option is selected, the options below it become available.
   • Desired R/A for Spirals—Specifies the target R/A ratio for spirals that are created.
   • Create Spirals And Match Tangents Where Possible—Specifies that the solution will follow the tangents as much as possible. If no solution is available, then the tangents are moved toward the circles until a spiral solution is found between the tangent and the curve.
   • Minimum R/A For Spirals—Specifies the minimum R/A ratio for spirals that are created. This value controls the length of the spirals:
     • A higher value produces shorter spirals.
     • A lower value produces longer spirals.
10. Under Creation Settings, specify the following parameters:
    • Alignment Name
    • Site
    • Alignment Style
    • Alignment Label Set
    • Layer Spiral Type
11. Select the Show Report check box to specify whether to show a report of the best fit regression points.
12. Select the Label Offsets check box to insert labels into the drawing that show the offset information that is displayed in the Best Fit Alignment Report Vista.
13. Click OK.