Plan view of 3D curb polylines with ramp dimensions
3D view of curb polylines and ramp
This command modifies 3D curb polylines to fit in a ramp of the
specified dimensions. For input, this command requires 3 3D
polylines that define the face of curb (bottom and top) and the
back of curb. There is a dialog to enter the curb dimensions. For
the Pick Method, the Center method places the ramp
centered at the pick point. The Sides method prompts to pick
two points on the curb polylines to define the left and right sides
of the ramp. The Driveway method allows you to create
multiple ramps at once by selecting closed polylines that represent
driveways. These polylines must be closed polylines with two
vertices on the curb polyline. The ramp is fit between these two
vertices. The Elevate Driveway option sets the elevation of
the driveway polyline to match the curb polyline. The Back
Taper option applies the Front Taper width to the back of the
ramp as well as the front. The Lip Method controls the
height between the bottom-of-curb and top-of-curb polylines at the
bottom of the ramp. The Ramp Slope method sets the slope
between these polylines to match the ramp slope and the
Height method sets a fixed height. The Slope Method
controls the ramp slope. The Match Curb Height method sets
the slope so that the back of the ramp reaches the original
height of the top-of-curb. The Slope method sets the ramp
slope to the specified value.
After the dialog, the program prompts to pick the curb 3D
polylines to draw the ramp. The existing 3D curb polylines are
modified to lower the curb for the ramp and new 3D polylines are
drawn for the rest of the ramp. Also, the program updates other 3D
linework that crosses the ramp such as sidewalks. These 3D
polylines can then be used for breaklines in surface modeling such
as with the Triangulate & Contour routine.
Curb Ramp dialog
Select curb polyline: pick a polyline
Select curb polyline (Enter to end): press Enter
Pulldown Menu Location: 3D Data > 3D Polyline
Utilities
Keyboard Command:
curb_ramp
Prerequisite: 3D curb polylines