Leica GPS1200 Series Technical Reference Manual page 1010

Reference Line
Defining a reference
line/arc
Target point: The design point.
•
•
Measured point: The current position.
A reference line can be defined in the following ways:
• Two known points
• One known point, an azimuth, a distance and a gradient
• One known point, an azimuth, a distance and a difference in height
P0
GPS12_112
A reference arc can be defined in the following ways:
• Two known points and a radius
• Three known points
GPS1200
For measuring to a reference line, this is the point with the coordi-
nates of the current position and the designed or calculated height.
For staking or grid staking to a reference line, this is the point to be
staked.
P1
P0 Start point
P1 End point
d1
d1
d2
d2
α
β
Known distance
Δ
Difference in height, Ht
Azimuth
Elevation angle between the start point and
the end point
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