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Rail Settings,
Gauge device page
Roads - General
Field
Option
Calculate
Check box
chainage
along chord
Next step
Page changes to the Info page.
Available for Rail only.
A gauge device is used to measure the track geometry or the relative positions
of the rails.
Requirements to connect to a gauge device
Configure an interface connection to be used with a device called GAUGE
DEVICE. Create the device GAUGE DEVICE manually with the standard commu-
nication parameters for RS232. For example, configure a GeoCOM connection
using TS Bluetooth 1 with the device GAUGE DEVICE.
Description
When this box is not checked, the chainage
refers to the centreline of the alignment. The
app calculates the points to be staked out
from that chainage.
When this box is checked, the chainage is
calculated along chords defined for the arc.
The setting is applied to the entire align-
ment. To stake arcs along the centreline, the
check box must be unchecked.
c = 100 ft
c = 100 ft
a = 750 ft
a' = 750 ft
0014588_001
a Start chainage on centreline
a' Start chainage on chord
b End chainage on centreline
b' End chainage on chord
c Chord length
d Last chord at the end of an arc. May be
shorter than the defined chord length.
At the end of a first arc when starting a
straight, the chainage is calculated again
along the centreline until the next arc starts.
At the end of the straight when starting the
second arc, a new chord of the defined
length is started to be used as chainage ref-
erence.
At the end of an arc or for a short arc, the
chord may be shorter than the defined chord
length.
d = 86.48 ft
b = 1080 ft
b' = 1036.48 ft
639
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