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47
12. 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 ih: Instrument height
E0: Station point E coordinate
Z: Zenith angle
fh: Target height
Z0: Station point Z coordinate
Az: Direction angle
G
Z (zenith angle) is calculated as 360° -Z when the telescope is in the face left
position if either the horizontal angle has been set to 0 by pressing
[0SET]
or the
required horizontal angle has been set by pressing
[H.ANG]
.
• If not measured or the space is left blank “Null” will be displayed.
If station point Z coordinate is set to “Null” the observation result for the Z
coordinate is automatically set to “Null”.
X
PROCEDURE
1. Sight the target at the target point.
12.3
3-D Coordinate Measurement
X130R.book 47 ページ 2003年10月8日 水曜日 午後12時53分
Summary of Contents for 130R Series
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