Product Manual

Element Description
Straight A straight has to be defined by:
•
Start point (P1) and end point (P2) with known Easting and Northing
coordinates.
TSOX_109
P1
P2
P1 Start point
P2 End point
Curve A circular curve has to be defined by:
•
Start point (P1) and end point (P2) with known Easting and Northing
coordinates.
•
Radius (R).
•
Direction: Clockwise (b) or Anticlockwise (a).
TSOX_090
P1
R
R
b
a
P2
P1 Start point
P2 End point
R Radius
a Anticlockwise direction
b Clockwise direction
Spiral / Clo-
thoid
A spiral is a transition curve whose radius changes along its length. A 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 (
A =
L · R
) or length (L) of the spiral.
•
Direction: Clockwise or Anticlockwise.
•
Spiral type: Spiral in or Spiral out.
T
SOX_111
R
R
L
P1
P2
P1 Start point
P2 End point
R Radius
L Length
Spiral types
•
Entry spiral (Spiral in = A): Spiral with a radius of infinity at the start
and a given radius at the end.
•
Exit spiral (Spiral out = B): Spiral with a given radius at the start and
radius of infinity at the end.
•
Partial/Ovoid spiral: A spiral with a given radius at the start and
another given radius at the end.
Applications 95