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43.6.7
Description
Concept
Roads - General
lots, working corridors are useful to avoid displaying results from the wrong
centreline element.
The following example shows the result if working without a defined working
corridor. For the measured position (b), the app finds the centreline point (c)
with the minimum perpendicular offset (f).
With a defined working corridor (e), the app would display a message advising
that the measured position is outside of the defined centreline.
a
Road_081
a
Centreline
b
Measured position
c
Projected point on the centreline
d
Defined offset range for the working corridor
e
Working corridor
f
Offset from the centreline, if no working corridor is used
The working corridor is defined in Road Settings, Design page. Refer to
"43.3 Configuring Roads Apps" for more information.
Road - Extension of the Centreline
Whenever centrelines must be extended, for example, at the start and end area
of an alignment or slope. The projection of the measured position to the cen-
treline is made using the tangent of the start/end point of the centreline.
In this case, a warning appears informing that the original design is exceeded.
The app advises as soon as a measured position is within the design area once
again.
When expanding the centreline the geometry will be continued using the tan-
gent of the start/end point of the centreline.
d
d
c
e
f
e
b
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