Leica GPS1200+, Technical Reference Manual, Page: 1263 / 1442

Survey - Hidden Points 1263
47.3.3 Double Distance
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 distances from the known points to the hidden points are to be determined. The location
of the hidden point relative to the line between the two known points is to be defined.
Diagram
Known
P0 First known point, <Point A:>
P2 Second known point, <Point B:>
d3 Line from P0 to P2
a
Right of d3
b Left of d3
To be measured
d1 Distance from P0 to P1
d2 Distance from P2 to P1
Unknown
P1 Hidden point
GPS12_44
P2
P1
d3
d2
d1
P0
b
a