The distances from the known points to the hidden points are to be deter-
mined. The location of the hidden point relative to the line between the two
known points is to be defined.
Diagram
GS_065
P2
P1
d3
d2
d1
P0
b
a
Known
P0 First known point
P2 Second known point
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
Description
Two points must be known. They
•
can exist in the job.
•
can be manually measured during the hidden point measurements.
•
can 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
GS_067
P0
P1
d1
d2
P2
Known
P0 First known point
P1 Second known point
To be measured
d1 Chainage
d2 Offset
Unknown
P2 Hidden point
Description
In order to compute the hidden point, the measurements are taken from the
hidden point.
One point must be known. It
Chainage & offset
Backwards bearing &
distance
Apps - The Toolbox
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