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?