SE $212-$ Exercise $(12)$

Question One

$($a$)$ Convert quadrant bearing to whole circle bearing:

$($b$)$ Convert the whole circle bearing to quadrant bearing

Question Two

Stadia$-$hairs leveling instrument at station $($A$)$ was used to take the following readings $($m$)$ on a

vertical staff, $(1\mathrm{.}32-2\mathrm{.}015-2\mathrm{.}71)$ at station $($B$).$ Then the instrument at station $($A$)$ was used to

take the following readings $(m)$ on a vertical staff, $(1\mathrm{.}897-2\mathrm{.}895-3\mathrm{.}893)$ at station $($C$).$

Compute the horizontal distances between station $($A$)$ and the two stations $($B$)$ and $($C$).$ Also find

the level of the two stations $($B$)$ and $($C$)$ if the level of station $($A$)$ is $28\mathrm{.}48m$ and the height of

line of sight above ground is $1\mathrm{.}22m.$

Question Three

A theodolite was temporary adjusted at station $Q.$ The graduated staff was held vertically at

station $P$ followed by station $R.$

Staff readings, vertical angles and horizontal circle readings were recorded at station $Q$ as below:

$($height of instrument $=1\mathrm{.}50m)$

Compute:

$1-$ Horizontal ground distance QP$.$

$2-$ Horizontal ground distance QR$.$

$3-$ Horizontal angle $PQR.$

$4-$ Horizontal ground distance PR$.$

$5-$ Difference in level between $P$ and $R.$

Question Four

$($i$)$ From your experience during the course, mention all the surveying instruments that you are

aware of and their type of observations?

$($ii$)$ Mention two surveying instruments that can be used for measuring stations' coordinates?