The Level:
The
surveyor uses a level to determine elevations. Levels fall into three
broad categories: a "dumpy" level, a "Wye" (or 'Y')
level, and "automatic" level. As with all tools of the
surveyor, there are various degrees of accuracy within each category of level.
A "dumpy" level has a telescope with cross hairs
permanently mounted in a pair of arms.
A "Wye level has a telescope with cross hairs that is
removable from the arms.
An "automatic" level is basically a dumpy level,
but it has a built in compensator that automatically adjusts for minor errors
in the setup of the instrument.
In conjunction with a level, the surveyor will use a
"level rod" to read an elevation up or down from the level of the
telescope. From these observations, a surveyor can determine differences
in elevation of different points or transfer an elevation from one location to
a distant location.
Wey Level Automatic Level
Staff:
The
leveling staff is the graduated wooden rod measuring vertical distance between
the points on the ground and the line of collimation. Leveling staves are the
classified into two groups (1) Target staff and (2) Self Reading staff.
Distance Meter:
It
use for measuring the distance horizontalverticallyit’s also use for measuring
the area valium.
GPS:
The Global Positioning System (GPS)
is defined as a radio navigation system involving satellites and computers that
can deter mine the latitude and departure of a receiver on the earth by the
computing the times difference for signal range
From different satellites to the receiver.
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