<< Click to Display Table of Contents >> Navigation:  Design > Strings > Gradient to 2D Polyline from Levels/3D Polylines

Purpose

The intended purpose is to define a kerb for example by a specified gradient from a threshold (or back of footpath) with the help of a reference 2D Polyline to set the direction of fall. The reference 2D Polyline may or not be an existing or design centre. Also see menu item Strings, Drape onto Sloping surface that can provide a more automatic method and work on multiple 2D Polylines that need to be converted into 3D.

 

Operation

Pick the reference 2D Polyline. Note that levels from the vertices within the 3D Polylines and levels from the level blocks will be projected at right angles to the reference 2D Polyline onto the 2D Polyline representing the kerb. Return

Pick the 2D Polyline representing the kerb (or it could be a channel).

Select one or more 3D Polylines and/or Levels representing the threshold.

OK to accept the fall gradient or enter alternative.

Yes to write a section file for the kerb.

Yes to draw a 3D Polyline for the design.