For Test 3 Flashcards Preview

Intro to Land Surveying > For Test 3 > Flashcards

Flashcards in For Test 3 Deck (82):
1

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Circular Level Vial

2

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Base

3

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Collimator

4

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Collimator

5

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Communication Port

6

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Display and Keyboard

7

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Eyepiece Focus

8

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Eyepiece Focus

9

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Handle

10

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Handle

11

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Horizontal Axis

12

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Horizontal Circle Lock

13

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Horizontal Circle Tangent Screw

14

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Horizontal Motion

15

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Keyboard

16

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Leveling Head

17

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Leveling Screws

18

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Objective Focus

19

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Objective Lens

20

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Optical Plummet Eyepiece

21

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Optical Plummet Lens Focus

22

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Tribrach Leveling Screws

23

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Tribrach Lock

24

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Tribrach

25

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Tripod

26

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Vertical Axis

27

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Vertical Circle Lock

28

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Vertical Circle

29

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Vertical Tangent Screw

30

1 rod=1 pole=1 perch=_____ft

16.5

31

1 mile=_____ft

5280

32

1 acre=_____(with chains)

10ch^2(10(66x66))

33

1 acre=____m^2

4046.9

34

1 acre=____ft^2

43,560

35

1 mile=_____chains

80

36

1 chain=____ft

66

37

When computing coordinates, the sine of a line's azimuth multiplied by the line's length produces the line's _____.

Departure

38

When computing coordinates, the cosine of a line's azimuth multiplied by the line's length produces the line's _____.

Latitude

39

Azimuths are always measured in a _____ direction.

Clockwise

40

A bearing can not be greater than ____ degrees.

90

41

There are ____ minutes in a degree.

60

42

The close agreement or consistency of a group of measurements is _____.

Precision

43

The most often or commonly occurring measurement in a group is called the ____.

Mode

44

How many square chains are in a 1 acre tract?

10

45

1 Square Mile =______acres

640

46

1 acre tract=______ square perches

160

47

A measured value that is as close to the true or theoretical value as possible is _____.

Accurate

48

Setting the instrument over the wrong station is a ______.

Mistake

49

A series of consecutive line's directly measured by angle and distance on the ground is a ______.

Traverse

50

The distance formula

√((N₁-N₂)²+(E₁-E₂)²)

51

Standard Deviation Formula

σ=√(Σv²)/(N-1)

52

First Quadrant Bearing to Azimuth Conversion:

Drop lettersEx. N 27° E27°

53

First Quadrant Azimuth to Bearing Conversion:

Add letters N EEx. 45°N 45° E

54

Second Quadrant Bearing to Azimuth Conversion:

Drop LettersSubtract from 360° (360°-bearing)Ex. N 35° W(360°-35°=325°) 325°

55

Second Quadrant Azimuth to Bearing Conversion:

Subtract from 360° (360°-azimuth)Add letters N WEx. 295°(360°-295°=65°) N 65° W

56

Third Quadrant Bearing to Azimuth Conversion:

Drop lettersAdd to 180° (180°+Bearing)Ex. S 65° W(180°+65°=245°) 245°

57

Third Quadrant Azimuth to Bearing Conversion:

Subtract 180° (azimuth-180°)Add the letters S WEx. 260°(260°-180°=80°) S 80° W

58

Fourth Quadrant Bearing to Azimuth Conversion:

Drop LettersSubtract from 180° (180°-bearing)Ex. S 25° E(180°-25°=155°) 155°

59

Fourth Quadrant Azimuth to Bearing Conversion:

Subtract from 180° (180°-azimuth)Add letters S EEx. 110°(180°-110°=70°) S 70° E

60

The abbreviation MSL stands for _________.

Mean Sea Level

61

A monument (e.g. brass disk) of known elevation is a _______. 

Bench Mark

62

The process of determining elevations or differences in elevations is called ________.

Leveling

63

The wooden, calibrated (numbered) rod that is sighted is called a _________ rod.

Philadelphia

64

When turning tribrach screws, the rule is that the level bubble follows the instrument operator's ___________.

Left thumb

65

The abbreviation EDM stands for ___________.

Electronic Distance Measurement

66

A normal section of land in a PLSS state contains ________.

640 acres

67

Surveys that determine the location and elevation of natural and artificial features are _______ surveys.

Topographic

68

The compass' tendency to point to the magnetic pole in Canada rather than the true north pole produces a horizontal angle between the two meridians which is called _______.

Magnetic Declination

69

On a USGS topographic map, astronomic and magnetic north are shown in relation to the map orientation which is ________ north.

Grid

70

The abbreviation LEC stands for _______.

Linear Error of Closure

71

To find the azimuth of a line you use this formula:

tan-1θ=departure/latitude

72

The large books that were shown in class are called:

Tax Maps and/or Land Books/Indexes

73

A permanent object that marks a property corner, e.g. an iron pipe or a large tree is called:

Monument

74

A right given by grant, agreement, or deed which allows a person to use the land or another for a specific purpose such as a road or utility line, is an

Easement

75

Boundary Monuments are of two main types. They are

Natural and Artificial

76

The Doctrine of Adverse Possession is based on 

The Statute of Limitations

77

A marked tree or object near a corner monument is called a 

Reference

78

Term given to the manner in which rights to land are held in any given country

Land Tenure System

79

Three categories of Land Surveys:

1. Original Surveys

2. Retracement Surveys

3. Subdivision Surveys

80

A characteristic of a good Point of Beginning

Its identity is clear and certain in the field.

81

The name of the first century mathematician in Alexandria, Egypt, whose formula we use to find the area of a triangle is _______.

Herron

82

Herron's Formula

s=(a+b+c)/2Area=√s(s-a)(s-b)(s-c)