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 AutoCAD POINT entities. This
routine can be useful if
the linework is created in 2D at zero elevation, 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.
Select points and polylines.
Select objects: select polylines to convert and the
points with elevation
Keyboard Command: 2dto3dpt
Prerequisite: A polyline and
points