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Create densified line segments

In the Create Features pane, feature templates for polyline layers include the Densify Lines setting. This setting automatically adds additional vertices at even intervals along straight line segments as you create a new polyline feature. Arcs and curves are not densified.

The Sample Distance parameter specifies the distance between vertices. You can change this parameter or turn Densify off as you create new geometry. Densifying a 2D polyline is often used to add vertices for snapping from-to links when transforming features.

A common use for densifying a z-enabled 3D polyline is to drape it onto a surface. When you enable the Surface mode Surface on the Edit tab and draw a two-point 3D polyline across a surface, the z-values for the densified vertices are derived from the active surface.


You cannot create densified line segments in 3D scenes with this release of ArcGIS Pro.

Densify lines

To densify a line segment, use the Line Line construction tool and turn Densify Lines on.

  1. In the Catalog pane, do one of the following to add a polyline layer to your map:
    • Expand Databases Databases, expand the database containing your data, and drag the feature class onto the map.
    • To create a new data source, right-click the default database, click New, click Feature Class Polygon feature class, type the feature class name, choose Polyline for the geometry type, select the coordinate system, and click Run Run.

    The layer is added to the current map, and a feature template with default settings is automatically created.

  2. On the Edit tab, in the Features group, click Create Create Features.

    The Create Features pane appears.

  3. In the pane, click the polyline feature template.

    The template expands to show the tool palette, and the construction toolbar appears in the current map or scene view.

  4. Next to the tool palette, click the forward arrow Forward.

    The tool palette and the feature attribute table for the active template appear in the pane.

  5. Click Attributes Attributes and type the values you want to apply to the new feature.
  6. On the Edit tab, in the Snapping group, click the Snapping List By Snapping arrow and enable your snapping preferences.
    • To temporarily turn snapping off as you create the feature, press and hold the Spacebar.
  7. Click the Line Line construction tool.
  8. If the feature class is z-enabled, on the Edit tab, in the Elevation group, click the Mode drop-down arrow Constant and enable one of the following z-value modes:
    • Constant mode Constant—Z-values are typed in the text box and applied to all vertices until you change the value.
    • Surface mode Surface—Z-values are derived from the active elevation surface when you click the map and the line is draped onto the surface.

      To add a surface to a map, on the Edit tab, in the Elevation group, click the Elevation Surfaces dialog box launcher.Launcher.

  9. Check the Densify Lines check box.

    The arc segments tools are disabled on the construction toolbar

    Construction toolbar
  10. In the Sample Distance text box type the distance between each vertex.
  11. Create the new polyline feature using one or more of the following methods:
    • Click the map, drag the pointer, and click the map again.
    • Right-click and use the context menu to specify x,y,z coordinate locations, distance, and direction.
  12. If you are creating a multipart feature, right-click and click Finish Part Finish Part, and create the next component feature.
  13. When you finish creating the feature, right-click and click Finish Finish, or press the F2 key.

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  1. Densify lines