Leica TS03 User Manual page 124

Vertical geometry
elements
124
Element Description
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.
B
TSOX_112
For onboard input Road 3D supports the following elements for vertical align-
ments.
Element Description
Straight A straight has to be defined by:
Start chainage and start height of P1.
•
• End chainage and end height of P2, or length (L) and
slope (%).
+%
P1
TSOX_113
Transition A circular curve has to be defined by:
curve Start chainage and start height of P1.
•
End chainage and end height of P2.
•
• Radius (R).
Type: Convex (crest) or Concave (sag).
•
a
P1
R
TSOX_051
Quadratic A quadratic parabola has the advantage that the rate of
parabola change of grade is constant, resulting in a "smoother" curve.
A quadratic parabola has to be defined by:
• Start chainage and start height of P1.
End chainage and end height of P2.
•
• Parameter, or Length (L), grade of entry straight
(GradeIn) and grade of exit straight (GradeOut).
A
P2 P1
L
-%
L
P2
b
R R
P2
P1
P2
R
A Entry spiral
B Exit spiral
P1 Start point
P2 End point
L Length
% Slope
a Convex
b Concave
P1 Start point
P2 End point
R Radius
Apps