Leica FlexLine TS02 User Manual page 177

Applications
Element Description
R
a
R
P2
TSOX_090
Spiral / A spiral is a transition curve whose radius changes along its length. A
Clothoid
spiral has to be defined by:
• Start point (P1) and end point (P2) with known Easting and
Northing coordinates.
• Radius at the start of the spiral (R).
• Spiral parameter (
• Direction: Clockwise or Anticlockwise.
• Spiral type: Spiral in or Spiral out.
P1
b
L · R ) or length (L) of the spiral.
A =
P1 Start point
P2 End point
R Radius
a Anticlockwise direction
b Clockwise direction
FlexLine, 177