Spectra Precision FAST Survey Reference Manual - Manual (Page 303)

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2D Polyline (PL) (AutoCAD style):
This command allows you to pick points from the screen or type in point numbers or snap to line segments. The snaps
appear as icons (see below) and include, in order, left to right: "Endpoint," "Midpoint," ""Center of Arc or Radius
Point," "Intersection," "Nearest," "Perpendicular," and "Tangent to Arc." The "Nearest" snap will simply pick a point on
any line or arc you select, at the nearest point to where you pick. First, pick your starting point then you have several
options on the command line. You can also draw by point number and even use ranges, as in 8-10,37 which would draw
sequentially from 8 through 10 then to 37, as shown below.
Points can be entered or picked from the screen. The default option is to keep picking points and the other options are
described below.
Cmd:Polyline-Arc/Close/Undo/
A
: Starts an arc segment. See below for details.
C
: Closes the polyline (you must have at least two polyline segments drawn before you can close)
U
: Will undo the last segment drawn (you can Undo again and remove multiple segments)
E
: Will end the Polyline command.
Constructing an arc segment
After choosing A, the command line will change to:
Cmd: Polyline-Arc CEn/Len/Sec/
You have various options for constructing an arc as part of your polyline.
CEn
: Allows you to specify the center point (or radius point) for the arc. After picking the center point, you
must specify the arc end point and then the arc direction.
LEn
: Allows you to specify the arc length. First you pick the arc end point and then you can enter the arc
length. The minimum arc length is given to you.
SEc
: Allows you to specify the second point and end point to define the arc.
Rad
: Allows you to specify a radius length. First you pick the arc end point and then you can enter the radius
length. The minimum radius length is given to you.