Leica GPS1200+, Technical Reference Manual, Page: 1269 / 1442

Survey - Hidden Points 1269
47.3.4 Chainage & Offset
Description 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.
Diagram
Known
P0 First known point, <Point A:>
P1 Second known point, <Point B:>
To be measured
d1 Chainage
d2 Offset
Unknown
P2 Hidden point
GPS12_46
P0
P1
d1
d2
P2