Spectra-precision Survey Pro v3.80 Recon iPAQ User Manual Manual do Utilizador descarregar pdf (Página 164)

User’s Manual

156

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).

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.

Current

Station

Chord

Offset

Chord Dist.

Chord Length

PC Deflection

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Spectra-precision Survey Pro v3.80 Recon iPAQ User Manual Manual do Utilizador Página 164