lidar applications overview summer 2012. definition lidar: light detection and ranging
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LiDAR ApplicationsOverview
Summer 2012
Definition
LiDAR: Light Detection And Ranging
Basic Principles Combination of 3 technologies
– Laser Ranging– GPS– IMU
Active Sensor – Can be acquired at night
Platforms– Fixed or Rotary Wing Aircraft– Terrestrial; Vehicle & Tripod
Basic Principles
IMU
Basic Principles
Pulse Repetition Frequency (PRF) Multi-pulse (in air) Multiple Returns Scan Frequency Scan Angle Platform Speed and Altitude Intensity
LiDAR Categories
Aerial Terrestrial
Mobile StaticTopographic Bathymetric
Fixed Wing Rotary Wing
Aerial SensorsExamples: Optech Leica Riegl
Fixed Wing
Fixed Wing
Cabin Footprint:
Fixed Wing
Typical Applications:
Wide Area MappingFloodPlainsCounties/StatesForestry ApplicationsLandfills/Quarries/Volume AnalysisMost 1’ & 2’ Contour Interval Projects
Fixed Wing
Typical Parameters:
500m – 2000m AMT70kHz – 200kHzPoint Spacing .5m – 2m (Single Swath)Swath 200m – 1km and higher
Focus on covering more ground, more quickly
Rotary Wing
GeoDigital International
Rotary Wing
Typical Applications:
Corridor MappingDOTTransmission
Rotary Wing
Typical Parameters:
Acquisition a couple hundred feet above the groundUpwards of 200kHz10-30 points per meterSwath 200’-1000’
Focus on max point density for small feature ID
Rotary Wing
Static LiDAR
Leica HDS – Scan Station
Riegl VZ-400
Examples:
Static LiDAR
Typical Applications:
RefineriesSubstationsIntersectionsPipesLock WallsCaves/Mines
Static LiDAR
Typical Parameters:
Usually tripod based within a couple hundred feet of targetSeveral points per square foot to several points per inchUsually accompanied with imaging sensor for RGB assignmentControlled with prisms occupying surveyed control points
Focus on max point density for small feature ID and modeling
Static LiDAR
Mobile LiDAR
Optech Lynx Street Mapper
Examples:
Mobile LiDAR
Typical Parameters:
Several points per square footUsually accompanied with imaging sensor for RGB assignmentControlled with targets occupying surveyed control points
Focus on max point density for small feature IDData often adjusted to control established by level loop for
high accuracy grading
Mobile LiDAR
Typical Applications:
Corridor MappingDOTStreet Level VisualizationTransmissionRail Corridors/Tunnels
Mobile LiDAR
Mobile LiDAR
Mobile LiDAR
Questions?
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