How To: Modify the length of two connected polylines
Instructions provided describe how to edit two line features in the same feature class or shapefile, at the same time, that share a common end point.
For example, segment A is 100 ft long, and segment B is 100 ft long. The end node of A is coincident with the start node of B. To extend A to 10 ft longer without overlapping B, follow the procedure below to make A 110 ft and B 90 ft.
Before following the steps below, have two polyline features in the same feature class or shapefile that have a node that is coincident.
- In ArcMap, View > Toolbars, turn the Editor and Topology toolbars on.
- On the Topology toolbar, click the Map Topology icon.
- In the Map Topology dialog box, select the polyline layer. Keep the default tolerance and click OK.
- On the Editor toolbar, click the Editor drop-down and select Start Editing.
- On the Editor toolbar, set the task to Modify Feature and the target to the polyline feature class or shapefile.
- On the Editor toolbar, click the Edit tool. Click on one of the two line features to select it. Make a note where the segments approximately meet.
- Click a blank space on the map with the Edit tool to deselect the line.
- On the Topology toolbar, click the Topology Edit tool.
- While holding down the 'N' key, draw a box around the commonly placed node between the two lines. Only the node should select in a pink color. Let go of the 'N' key.
- While holding down the 'S' key, click and drag the selected node. The node can be moved by dragging it. If the X,Y destination is known, right-click > Move To, and enter the X,Y values.
- On the Editor toolbar, click Save Edits and Stop Editing.