Calculate circular arcs

The Circular Arc tool Circular Arc creates two-point tangent or non-tangent circular arc segments based on specified parameters. It is available on the context menu when you right-click the map while a polyline or polygon feature construction tool is active in the Create Features pane.

When you use this tool, consider the following:

  • Vertices for 3D z-aware features are assigned z-values based on your current elevation settings.
  • If ground to grid corrections Ground to Grid Correction is turned on, the direction values you enter are rotated and the distance values are scaled for the resulting geometry. When you create two-point COGO enabled lines, the direction and distance values you enter are stored with the feature in the Direction and Distance attribute fields, respectively.

To calculate a circular arc, complete the following steps:

  1. Add your data and configure settings for editing.

    Confirm that the feature layer you are editing is editable, the coordinate system assigned to the active map is suitable for the type of edits you're performing, and snapping is configured to help you work efficiently and accurately.

  2. On the ribbon, click the Edit tab. In the Features group, click Create Create Features.
  3. In the Create Features pane, click a polyline or polygon feature template.

    To find a feature template containing a specific word or phrase, click the Search box Find and enter your search criteria. Search is not case-sensitive.

  4. Click the Line tool Line, or the Polygon tool Polygon.
  5. On the construction toolbar, click the Arc Segment tool Arc Segment, or the End Point Arc Segment tool Arc Segment.
    Construction toolbar
  6. Click the map to create the first vertex of the arc.

    To enter a coordinate location, click Absolute X,Y,Z Move To.

    If you are continuing an existing segment and creating an inline arc, the last vertex of the previous segment is automatically used for the first vertex. In this case, skip this step.

  7. Right-click the map and click Circular Arc Circular Arc.
  8. In the Circular Arc dialog box, enter the required parameters to calculate the circular arc, and press the Enter key.

    To change direction or distance units, click a parameter drop-down arrow.

    Circular Arc dialog box

    The default values in the dialog box are based on the location of unfinished vertices in the map.

  9. To continue creating segments, use the tools on the construction toolbar.
  10. Click Finish Finish, or press the F2 key to finish the feature.

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