The Offset Line tool creates a parallel line to your project item. It only works on the selected item and appears in the TOOLS tab. 


Offset Line works on:

  • Polyline items
  • Boundary items



This tool can create parallel lines either on terrain or with a user specified Z offset. 



Quick Guide

On terrain

  1. Select the line or boundary you want to offset.
  2. Go to the TOOLS tab and enable Offset Line in the Create group.
  3. In the dialog box, select the On Terrain Z Offset Method.
  4. Make a left-mouse click on the location where you want the offset line to appear. The vertices of the new line will be placed on the terrain.


  5. Each click creates an offset line to the original line. 
  6. Make a right-mouse click to exit the Offset Line tool. 


User Z offset

  1. Select the line or boundary you want to offset.
  2. Go to the TOOLS tab and enable Offset Line in the Create group.
  3. In the dialog box, select the ΔZ Offset Method and set the Z offset value. A positive value creates a line above the original item and a negative value creates it under the original item.
  4. Make a left-mouse click on the location where you want the offset line to appear. The vertices of the new line will be increased or decreased compared to the original elevation.


  5. Each click draws a parallels with the same Z offset.
  6. Make a right-mouse click to exit the Offset Line tool. 


Usage

  • Use the offset tool for road survey. In general, curbs and gutters are not accurately model in the photogrammetry results. That can lead to a bad water flows analysis. Draw a curb line and offset it to create an accurate surface model of the curb and the gute. Use that surface to Modify Terrain and precisely shape gutter.


Tips and tricks

  • When the Offset tool is enabled and a survey item is selected, you can click on another project item to switch the base object to offset. 
  • It's not possible to do multiple offset in the same time. Only one base object can be selected at a time.