Civil Engineering Reference
In-Depth Information
In our simple scenario, boundary markers were conveniently found at corners
“D” and A”. Oftentimes the only remaining boundary markers are not on a com-
mon boundary line but are well separated and it is not possible to see or meas-
ure between them. For example suppose the only remaining markers in Fig.
4.6
were at “A” and “C” and the client wanted corners “B” and “D” set. If there were
a building blocking the view between “A” and “C” it would not be possible to
directly use these points to set the remaining corners.
Surveyors get around such problems by “running a traverse”. A traverse is sim-
ply a series of survey lines that are run at convenient locations, usually not too far
from actual boundary lines. Consider Fig.
12.1
which shows the same parcel of
land, as in Fig.
4.6
, but this time with a traverse. The traverse is the red dash-dot
line. In this scenario the surveyor was required to set lot corners “B” and “D”.
Corners “A” and “C” were in existence from the original survey in the form of
drill holes found in concrete bounds [DH CB (fd)].
The actual location of the traverse lines is chosen by the surveyor after consider-
ing a number of factors. For example, because the instrument must be set on each of
the numbered points (1-5) it must be possible to easily and quickly see and measure
Fig. 12.1
A closed traverse
