Description of fields
TS_131
d1
d2
P1
P0
P2
α
Azimuth at-from
ß
Azimuth at-to
γ
Deflection angle
δ
Angle right
ε
Angle left
P0
Point ID
P1
At point
P2
To point
d1
Horiz distance at-from
d2
Horiz distance at-to
38.11
COGO Calculation - Horizontal Curve Method
Select
Horizontal curve
from the
COGO
menu.
For all point fields, the 3D viewer can be used to select the desired point.
To type in coordinates for a known point open a selectable list. Press
New
to
create a point.
Key
Description
Calculate
To calculate the result.
Inverse
To calculate the values for a distance and an angle from two
existing points. Available when a distance field or an angle
field is highlighted.
Last Inv
To recall previous results from COGO inverse calculations.
Available when a distance field or an angle field is highligh-
ted.
Meas app
To measure a point manually for the COGO calculation. Avail-
able if
Start point
,
Second point
or
End point
is highligh-
ted.
Page
To change to another page on this panel.
Description of fields
Field
Option
Description
Method
Selectable list The horizontal curve can either be defined by
three points or by two parameters.
Parameter
1
,
Parameter 2
Select which parameters are known. Available
for
Method
:
2 parameters
.
Radius
Radius of the curve.
Delta angle
Angle in the radius point.
DOC - Arc
The degree of curve defines the sharpness or
flatness of the curve. Degree of curvature in
arc definition. The central angle subtended
by one station of circular arc. Used in high-
way design.
SI units: 1 station = 20 m
English system: 1 station = 100 ft
Access
Horiz Curve Calcula-
tor,
Input page
COGO
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