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Introduction to LIDAR Mapping Technology
LIDAR (Light Detection and Ranging)
ALSM (Airborne Laser Swath Mapping) and laser altimetry
LASER (Light Amplification by the Stimulated Emission of Radiation)
•Amplified electromagnetic radiation of a specific frequency
and wavelength generated by stimulated emission.
•The radiation emitted by a laser consists of a coherent
beam of photons, all in phase and having the same
polarization
• Commonly generated in the UV-Visible-IR spectral range
Laser Pulse Generators
Airborne topographic mapping lidars - use 1064 nm diode-pumped YAG lasers
Bathymetric systems generally use 532 nm diode-pumped YAG lasers
Scanner and optics
Photodetector and receiver electronics
Position and navigation systems
Computer System, Memory Management and Data Processing Software
c = D / (T/2)
D = distance
T =
Two-way
Travel
time
Laser Pulse Reflection
•Airborne Laser Swaths / Flight Operations
•Data Management System
•Laser Pulse Generation
•Laser Pulse Detection
•Post-Processing / Error Corrections
•Post-Processing / Data Filtering
•Digital Modeling
•Image Production
laser scanning systems are capable of emitting up to 100,000 pulses per second
Bainbridge Island, WA Example – 7.5-Min DRG
Bainbridge Island, WA Example – 10 m DEM
3.6 m
Bainbridge Island, WA Example – LIDAR 3.6 m DEM
lidar_overview.ppt

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lidar_overview.ppt

  • 1. Introduction to LIDAR Mapping Technology LIDAR (Light Detection and Ranging) ALSM (Airborne Laser Swath Mapping) and laser altimetry LASER (Light Amplification by the Stimulated Emission of Radiation) •Amplified electromagnetic radiation of a specific frequency and wavelength generated by stimulated emission. •The radiation emitted by a laser consists of a coherent beam of photons, all in phase and having the same polarization • Commonly generated in the UV-Visible-IR spectral range
  • 2.
  • 3. Laser Pulse Generators Airborne topographic mapping lidars - use 1064 nm diode-pumped YAG lasers Bathymetric systems generally use 532 nm diode-pumped YAG lasers Scanner and optics Photodetector and receiver electronics Position and navigation systems Computer System, Memory Management and Data Processing Software
  • 4.
  • 5.
  • 6.
  • 7.
  • 8. c = D / (T/2) D = distance T = Two-way Travel time Laser Pulse Reflection
  • 9. •Airborne Laser Swaths / Flight Operations •Data Management System •Laser Pulse Generation •Laser Pulse Detection •Post-Processing / Error Corrections •Post-Processing / Data Filtering •Digital Modeling •Image Production
  • 10. laser scanning systems are capable of emitting up to 100,000 pulses per second
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16.
  • 17.
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.
  • 23.
  • 24.
  • 25.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31.
  • 32.
  • 33.
  • 34.
  • 35.
  • 36.
  • 37. Bainbridge Island, WA Example – 7.5-Min DRG
  • 38. Bainbridge Island, WA Example – 10 m DEM
  • 39. 3.6 m Bainbridge Island, WA Example – LIDAR 3.6 m DEM