For more details see 3D Polylines from Levels along a 2D Polyline
Purpose
To "project" Levels (or the vertices from 3D Polylines) onto a 2D Polyline to define a section.
Operation
2D Polyline in cyan, levels in white and 3D Polyline in yellow.
Pick the 2D Polyline and set maximum distances – levels and vertices further away will be ignored. Click the Select button and make a selection set of level blocks (and/or 3D Polylines). A list of resulting chainages and levels appears. The Add… button enables hand input and Clear will delete all lines in the list.
Settings for typical use when creating a section file
Click Start to write the section file.
To draw the section use menu item Sections, Draw Section.
