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Prepared By- Guided By-
• chodavadiya Kuldip (131090119015) Mr. Shirish G Bhalodia
• chodavadiya Bhautik (131090119016)
• Vekariya Bharat (131090119085)
• Mehta Khushal(131090119046)
• Dudhat Chintan (131090119025)
Levelling (2nd Rank)
LEVELLING
 The art of determining the relative heights
of different points on or below the surface
of earth is known as leveling
Uses of leveling
 To prepare a contour map
 To determine the altitudes of different important
points
 To prepare a longitudinal section
 To prepare a cross sections
 To prepare a layout map
Instruments for leveling
 A level
 A leveling staff
 Tripod stand
Types of levels
 Dumpy level
 Tilting level
 Automatic level
 Wye ( Y ) level
 Cooke’s level
 Crushing level
Methods of leveling
 Direct leveling
 Trigonometric leveling
 Barometric leveling
 Hypsometric leveling
Classification of Direct leveling
 Simple leveling
 Differential leveling
 Fly leveling
 Profile leveling
 Cross section leveling
 Check leveling
 Reciprocal leveling
Terms used in leveling
 Station
 Back sight ( BS)
 Fore sight ( FS )
 Intermediate
sight ( IS )
 Change point ( CP )
 Height of
 Instrument ( HI )
 Bench marks
 Reduced levels ( RL )
Types of Bench marks
 Great Triangulation Survey ( GTS )
 Permanent Bench marks
 Arbitrary Bench marks
 Temporary Bench marks
Computing Reduced Levels
 The collimation method or
Height of Instrument
 The rise and fall method
Balaji Engineering Collage
JUNAGADH

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Levelling .ppt

  • 1. Prepared By- Guided By- • chodavadiya Kuldip (131090119015) Mr. Shirish G Bhalodia • chodavadiya Bhautik (131090119016) • Vekariya Bharat (131090119085) • Mehta Khushal(131090119046) • Dudhat Chintan (131090119025) Levelling (2nd Rank)
  • 2. LEVELLING  The art of determining the relative heights of different points on or below the surface of earth is known as leveling
  • 3. Uses of leveling  To prepare a contour map  To determine the altitudes of different important points  To prepare a longitudinal section  To prepare a cross sections  To prepare a layout map
  • 4. Instruments for leveling  A level  A leveling staff  Tripod stand
  • 5. Types of levels  Dumpy level  Tilting level  Automatic level  Wye ( Y ) level  Cooke’s level  Crushing level
  • 6. Methods of leveling  Direct leveling  Trigonometric leveling  Barometric leveling  Hypsometric leveling
  • 7. Classification of Direct leveling  Simple leveling  Differential leveling  Fly leveling  Profile leveling  Cross section leveling  Check leveling  Reciprocal leveling
  • 8. Terms used in leveling  Station  Back sight ( BS)  Fore sight ( FS )  Intermediate sight ( IS )  Change point ( CP )  Height of  Instrument ( HI )  Bench marks  Reduced levels ( RL )
  • 9. Types of Bench marks  Great Triangulation Survey ( GTS )  Permanent Bench marks  Arbitrary Bench marks  Temporary Bench marks
  • 10. Computing Reduced Levels  The collimation method or Height of Instrument  The rise and fall method