3-D Coordinate Measurement - Sokkia SRX1 Operator's Manual

None (input azimuth angle only)/0 SET (horizontal angle set to 0°)/Azimuth (set both horizontal
and azimuth angles to the same value)/H.ANG (input both horizontal and azimuth angles)
15.3

3-D Coordinate Measurement

The coordinate values of the target can be found by measuring the target based on the settings of the
instrument station and backsight station.
The coordinate values of the target are calculated using the following formulae.
N1 Coordinate = N0 + S x sinZ x cosAz
E1 Coordinate = E0 + S x sinZ x sinAz
Z1 Coordinate = Z0 + S x cosZ + ih - fh
N0: Station point N coordinate S: Slope distance
E0: Station point E coordinate
Z0: Station point Z coordinate
"Null" coordinates will not be included in calculations. "Null" is not the same as zero.
15. COORDINATE MEASUREMENT
ih: Instrument height
Z: Zenith angle fh: Target height
Az: Direction angle
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