Unsplitting connected polylines

The Unsplit Connected Polylines tool is used to unsplit connecting features. Only features that are touching endpoint to endpoint and have the exact attribution on editable fields are unsplit. You can use this tool to merge features that are in the same network or create a polyline feature from two separate line features. For instance, you can create a single road feature using nearby roads that have similar attributes.

Example of two lines that have been merged into one
Two roads are merged into one feature
  1. Start ArcMap.
  2. If necessary, load data in the map.
  3. On the main menu, click Customize > Toolbars > Production Editing.
  4. On the main menu, click Customize > Toolbars > Production Editing Advanced.
  5. Click the Production Start Editing button Production Start Editing on the Production Editing toolbar.

    The Manage Features and Create Attributes, Update Attributes, or Metadata Attributes windows automatically appear when you start an edit session using the Production Start Editing tool.


    If the Create Attributes, Update Attributes, or Metadata Attributes window does not appear when you start an edit session, click the Show/Hide Attributes button Show/Hide Attributes on the Manage Features window.

  6. Click the Unsplit Connected Polylines button UnSplit Connected Polylines on the Production Editing Advanced toolbar.

    The Unsplit Polylines dialog box appears.

    Unsplit Polylines dialog box

  7. Choose either the Feature Class or Current Selection option.
    • Feature Class—Unsplits all the lines in the feature class
    • Current Selection—Unsplits the current editing selection only
  8. Choose the feature classes to unsplit in the Editable Line Feature Classes list.

    To choose all the feature classes, click Select All. To choose specific feature classes, click Clear All and check the check boxes next to the layers you want to unsplit.

  9. Click OK.

    A message appears when the unsplit connected features task is complete.

  10. Click OK.

    If z-enabled line features are snapped in x,y but have different z-values, they will not be merged.

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