Viva Series, Reference Line 971
Description of fields
Field Option Description
Create line
using
Select one of the following options to enter a refer-
ence line manually.
2 points For lines. Uses two known points to define the refer-
ence line.
Pt, brng, dist,
grade
For lines. Defines the reference line using a known
point, a distance, an azimuth and the gradient of the
line.
Pt, brng, dist, Δht For lines. The same as Pt, brng, dist, grade but uses
the difference in height instead of the gradient.
3 points For arcs. Defines the reference arc using three
known points.
2 points/radius For arcs. Defines the reference arc with two known
points and a known radius.
Select existing line
or Select existing
arc
Refer to "41.4.3 Selecting a Reference Line/Arc from
the Job"
Δ height Editable field For lines: Available for Create line using: Pt, brng,
dist, Δht.
The difference in height from the start point to the
end point of the reference line.
Arc distance Display only Available for arcs. The horizontal grid distance along
the arc between the three points. If the distance
cannot be calculated, ----- is displayed.
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