Surveying 1- PRELIM

studied byStudied by 45 People
0.0(0)
Get a hint
hint

Plane Surveying

1/29

Studying Progress

New cards
29
Still learning
0
Almost done
0
Mastered
0
29 Terms
New cards

Plane Surveying

the process of surveying by assuming that the earth is flat.

New cards
New cards

Geodetic Surveying

a process of surveying by considering the curvature or spherical shape of the earth.

New cards
New cards

City Survey

an extensive co-ordinated survey of the area within the limits of a municipally made for the purposes.

New cards
New cards

Forestry Survey

survey executed in connection with forest management and mensuration, and the production and conservation of forest land

New cards
New cards

Hydrographic Survey

They are of general importance in connection with navigation development of water supply and resources, flood control, irrigation and etc.

New cards
New cards

Topographic Survey

locates all surface features of a property, and depicts all natural and artificial features and elevations.

New cards
New cards

Route Survey

a data collection operation to gather information about the proposed route of a roadway, utility pipe, or railway.

New cards
New cards

Photogrammetric Survey

the branch of surveying in which maps are prepared from photo-graphs taken from ground or air stations.

New cards
New cards

Chains and tapes

measuring distances (horizontal)

New cards
New cards

Level

simple instrument designed to determine whether a surface is level or plumb (vertical)

New cards
New cards

Field notes

prepared to record all pertinent information, measurements, calculations, sketches, and observations made by the surveyor during the course of a survey

New cards
New cards

surveyor

professional person with the academic qualifications and technical expertise to conduct one, or more, of the following activities;

-to determine, measure and represent the land, three-dimensional objects, point-fields, and trajectories; -to assemble and interpret land and geographically related information;

New cards
New cards

Land Information Systems (LISs) and Geographic Information Systems (GISs)

areas of activity that have rapidly assumed positions of major prominence in surveying

New cards
<p>Transits and Theodolites</p>
New cards
<p>Transits and Theodolites</p>

Transits and Theodolites

These tools are used to measure both horizontal and vertical angles.

New cards
New cards

error

difference between a measured quantity and its true value, caused by imperfection in the measuring instrument, by the method of measurement, by natural factors such as temperature, or by random variations in human observation

New cards
New cards

Systematic Errors

repetitive errors that are caused by imperfections in the surveying equipment

New cards
New cards

Accidental Errors

difference between a true quantity and a measurement of that quantity that is free from blunders or systematic errors.

New cards
New cards

Mistakes

a significant mistake caused by human error

New cards
New cards

Mistakes

it is due to the inattention or carelessness of the it is due to the inattention or carelessness of the surveyor

New cards
New cards

discrepancy

difference between two observed values of the same quantity

New cards
New cards

Precision

the degree of refinement or consistency of a group of observations and is evaluated on the basis of discrepancy size

New cards
New cards

Accuracy

the absolute nearness of observed quantities to their true values

New cards
New cards

Most Probable Value

If two or more measurements of the same quantity are made, usually different values are obtained due to random errors

New cards
New cards

Error of Closure

difference between a measured quantity and its true, or actual, value

New cards
New cards

Relative Accuracy

For horizontal distances, the ratio of the error of closure to the actual distance

New cards
New cards

Weights are inversely proportional to the square of the corresponding probable errors.

W∝1/e^2

New cards
New cards

Weights are also proportional to the number of observations.

W∝ N

New cards
New cards

W∝1/D

Errors are directly proportional to the square roots of distances.

New cards
New cards
New cards