This command converts a 2D polyline into a 3D polyline by using the elevations of points. At each vertex of the polylines, the program looks for a point with elevation at the same x,y location. The points can be Carlson point blocks or POINT entities. This routine can be useful if the linework is created in 2D at zero elevation with commands like Draw 2D Polyline, and points with elevation are located along the linework. Then the linework can be converted into 3D polylines with this command. For example, a centerline polyline with arcs may need to be created in 2D for stationing because AutoCAD does not allow arcs on 3D polylines. To use this polyline as a breakline in surface modeling, this command can convert the polyline into a 3D polyline.
Maximum offset tolerance: points must be within this
distance of the polyline vertices to get applied.
Filter descriptions: filters point by their description with
ability for different vertical offsets by description.
Keep existing polylines: controls whether to erase for
original 2D polylines.
Set layer name for converted polylines: assigns the layer
name to the new 3D polylines.
Select Points Method: choose between screen picking the
points or entering point number to process.
2D to 3D Polyline dialog
Select polylines to convert.
Select objects: select
polyline(s)
Select points.
Select objects: pick point
entities
Changed 1 polylines.
The routine will convert the 2D polyline into a 3D polyline and
place it on the indicated layer.
Pulldown Menu Location: 3D Data > 2D to 3D
Polyline