I want to create a planar (=without volume) buffer polygon or a TIN from a polyline feature class that represents a road centreline ,containing Z-value. I want to expand my polyline horizontally (=parallel to ground) in 3D environment to get a 3D polygon which its volume is zero. I tried to use buffer analysis tool and enabled z value, but it results in a polygon without elevation. What I want is as same as Creating a 3D buffer polygons (plane) from a 3D polyline that follow line catenary curvatures except my goal is to calculate the cut & fill for a road.

enter image description here

In the attached image, the black polyline represents road centreline. The black polygon is the result of buffering and the red polygon, is a polygon which represents terrain. My ultimate goal is to calculate the volume between two polygons or surfaces to get cut & fill.

How can I create my desired polygon or surface in ArcGIS Desktop?

I have a 3D Analyst license and am using ArcMap/ArcScene/etc.

  • Create tin using same points with z value set to zero.
    – FelixIP
    Commented Mar 22, 2020 at 2:28
  • @FelixIP which points?
    – Sina_Alef
    Commented Mar 22, 2020 at 7:34
  • Same points from which your time made up
    – FelixIP
    Commented Mar 22, 2020 at 9:46


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