Leica Captivate, Техническое справочное руководство

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Field Option Description
DOC - Chord The degree of curve defines the sharpness or
flatness of the curve. Degree of curvature in
chord definition. The central angle subtended
by one station length of chord. Used in rail-
way design.
Arc length Total length of the circular curve from start
point to end point measured along its arc.
Tangent Length of the tangent from the tangent
point to the point of intersection.
External
secant
The distance from the point of intersection
to the midpoint of the curve. The external
distance bisects the interior angle at the
point of intersection.
Mid ordi-
nate
The distance from the midpoint of the curve
to the midpoint of the long chord. The exten-
sion of the middle ordinate bisects the cen-
tral angle.
Delta angle The angle where the two tangents intersect.
The angle between the tangents is also
equal to the angle at the centre of the curve
Next step
Calculate
calculates the result and accesses Horiz Curve Calculator , Results .
Key Description
OK To accept changes and return to Horiz Curve Calculator ,
Input page.
Page To change to another page on this panel.
Description of fields
TS_132
d1 r d4
d2
d5
d3
P0
P1
P2
α Delta angle
P0 Start point
P1 End point
P2 Second point
r Radius
d1 Chord length
d2 Arc length
d3 Tangent
d4 Mid ordinate
d5 External secant
Key Description
OK To accept changes and return to the Input page.
Page To change to another page on this panel.
Horiz Curve Calcula-
tor,
Results page
Horiz Curve Calcula-
tor,
Areas page
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