BRAE 237 GILL

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GPS

(global positioning system) is a satellite navigation system

how to find LOSD of stadia given top and bottom reading

100 * (top reading - bottom reading) answer in FEET

if latitude is 0 and departure is negative, what is azimuth?

270'00'00''

differential leveling table

Elevation + BS = HI HI - FS = Elevation

how to find departure

HD * cos(azimuth)

how to find latitude

HD * sin(azimuth)

what is needed to calculate allowable error

LOSD

if zenith angle is 90'00'00'' what is relationship between slope distance and horizontal distance? What is the vertical distance?

SD= HD VD= 0

theodolite

a surveying instrument with a rotating telescope for measuring horizontal and vertical angles.

how to find if error of closure for leveling is acceptable in real world?

acceptable error = 0.0014 * root (sum of LOSD) must be less than acceptable error

how to find azimuth from total station to point E given azimuth of set up point D and angle between D and E

add angle to to azimuth

rod reading to point of known elevation

backsight

permanent point of elevation

benchmark

three types of surveys done in class

boundary (cadastral), topographic, roads

types of surveys

boundary/cadastral topographic hydrologic mines solar buildings routes (roads, trails)

objectives for differential leveling

determine elevations of specific points

what is profile leveling

determining elevations along a line

what is differential leveling

determining elevations of specific points

how to tell if averages of angles are acceptable for class

difference between average between direct and inverted < 1'

what are latitudes and departures?

direction of a traverse travelled travel N/S for latitude travel E/W for departure

define surveying

discipline which encompasses all aspects of measuring, analyzing, and disseminating information bout physical earth

what does total station measure?

distances and angles

how to find how many inches are on map with scale and tic marks

divide tick marks / scale

EDM

electronic distance measurement

how to find elevation (given zenith angle, SD, elevation, instrument height, and rod height)

elevation of known point + vertical distance + instrument height - rod height

error of closure for leveling exercise

ending elevation - starting elevation

what is a closed traverse

establish perimeter and calculate area of polygon

what does it mean to plunge a the telescope of a total station

flip it 180 degrees

rod reading to point of unknown elevation

foresight

how to find nominal scale of map?

ground distance (ft) / distance on map (in) answer in 1" = ______'

break chaining/taping

holding the tape horizontally

precision

how close measurements or observations are to each other

accuracy

how close measurements or observations are to true answer

how to convert azimuth to bearing

if point in NW quarter, subtract from 360'00'00'' if point in SW quarter, subtract 180'00'00'' FROM it

how to find average angles between points A and B

insert calculations into calculator and subtract

IFS

intermediate foresight

LOSD

length of sight distance

ratio of error

linear misclosure / total perimeter give as ratio and decimal

why are you not allowed to erase in field book

looks like you are falsifying data, legal court document and should look professional

how to find distance between point A and B (if points given s **+**)

lose the plus sign and make them real numbers, subtract

what does if mean if starting elevation + sum of BS - sum of FS does not equal ending elevation

math error

what is closed traverse

measure distance and angles of polygon

do scales of plan view and profile view have to be the same

no

vertical distance / change in elevation (given zenith angle, SD, elevation, instrument height, and rod height)

slope distance * cos(zenith angle)

horizontal distance (given zenith angle, SD, elevation, instrument height, and rod height)

slope distance * sin(zenith angle)

linear misclosure

square root of ((sum of latitudes)^2 + (sum of departures)^2)

methods of measuring distance as used in class

stadia pacing tape total station

contour interval

the difference in elevation from one contour line to the next

temporary point of elevation

turning point

what are stadia

way to measure distance


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