Chainage & Offset - Leica GPS1200 Series Technical Reference Manual

46.3.4
Description
Diagram
Survey - Hidden Points
Chainage & Offset
Two points must be known. They
• may already exist in the job.
• may be manually occupied during the hidden point measurements.
• may be manually typed in.
The chainage from one known point along the line between the two known points must be
determined. The offset of the hidden point to the line between the two known points must be
determined.
P1
d1
P0
GPS12_46
d2
P2
Known
P0 First known point, <Point A:>
P1 Second known point, <Point B:>
To be measured
d1
d2
Unknown
P2 Hidden point
GPS1200
Chainage
Offset
1239