Spectra-precision Survey Pro CE v3.6 User Manual Uživatelský manuál stáhnout pdf (Strana 138)

User’s Manual

132

Tangent Offset

The Tangent Offset method computes a

perpendicular offset length (Tangent Offset)

from the PC-PI line to the current station

and the distance on the PC-PI line from the

PC to the Tangent Offset (Tangent

Distance).

RP

PT

PI

PC

Tan Offset

Current

Station

Tan Dist.

Tangent

Tan - TD

Chord Offset

The Chord Offset method computes a

perpendicular offset length from the PC-PT

line to the current station (Chord Offset), the

distance on the PC-PT line from the PC to

the chord offset (Chord Distance), the

distance from the PC to the current station

(Chord Length) and the deflection angle from

the PC-PT line to the PC-Station line.

RP

PT

PI

PC

Current

Station

Chord

Offset

Chord Dist.

Chord Length

PC Deflection

3. Define your horizontal curve by making the

appropriate selections from the first two

buttons and filling in the corresponding

values.

4. Enter the station to be assigned to the PC in

the

PC Station

field.

5. Check the

Interval

box if you want to compute

data for stations at fixed intervals on the

curve and enter the distance between them

in the same field.

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