surveying chapter2(a)
DESCRIPTION
Surveying Chapter2(a)TRANSCRIPT
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( Z H )
1.() (Leveling)(Direct LevelingDifferential Leveling)
hhi
2.(Trigonometric Leveling) dizh
(Elevation Surveying)
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3.(GPSGlobal Positioning System) Signal h
4.(Radar Altimetry) Signal h
5.(Barometric Leveling) Ph
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(Elevation Mensuration)
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1.( Level Surface)
2.(Level Datum) (Mean Sea Level , MSL)
3.(Horizontal Plane)
4.(Horizontal Line)
5.(Elevation , Height)
6.(Vertical Line)
7.(Vertical Angle)
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(1)
(2)
chm
kkm ()
20785.0 kC
20675.0 kh
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AH
baHH AB
(Level)
1.
abAB
(0
)A
B
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2. /
(1) (Optical Axis)
(2) (Line of Sight , Collimation Axis)
(3) (Tangent Line of The Level Tube, or Axis of Level Vial)
(4) (Vertical Axis) ()
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(5)(Turning Point TP)
2. /
(6)(Intermediate PointIP)
P
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(7)(Elevation of Collimation Axis)
(8)(Bench Mark BM)
()
2. /
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1. (Telescope)
(Reticle Cross-Hairs)
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2.(Mount)
3.(Level Vials)
(1)(Tube-type Level Vial)
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(2)(Coincidence-type Level Vial)
(3)(BullsEye Level Vial)
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(Sensitivity)
/
d2mm/
R ()
Rr()
"R
dr
"206265"
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"2062652
360
(1 Radian)
rad =
tan sin rad
5/20626"
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()
AAB
BBC
ABBC "206265
"
AB1/10000
620.
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(1)D
(2)
(3)N
(4)
1a
2a
DN
aar
" 206265)(" 12
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1.
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2.
m006.21006.1000.20
mHB 006.20000.1006.21
mHC 007.19009.1006.21
mHD 006.19000.2006.21
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1. (Dumpy Level) 2. (Tilting Level or Tilting Screw Level) 3. (Automatic leveling Levelor Self-Leveling Level) 4. (Digital Level)
(1) 3 4 (2) 43 (3) 123 (4) 23()
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(1) (2)
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WILD N3
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(1) (2) ()
(3) (4) ()
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(1) (2)
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(1) (2)() (3)
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1.
(1) (2) (3) () (1) (2) (3) () /(1) (2) (3) ()
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2.
(1)
(2) ()
(3) ()
(4) ()
(5)