LiDAR Surveying and the UAS Phenomena: Understanding How to “See the Wood for the Trees” SEPTEMBER 5 - 7, 2018
Terrestrial Laser Airborne LIDAR Unmanned Aerial Platforms Scanning Systems • LiDAR Types • Applications Platforms • • Scan Patterns • Collecting Data Payloads • • Acquiring LiDAR • Accuracy Influencers Data • • Accuracy Influencers • Capabilities UAS and LiDAR • • Capabilities • Limitations Accuracy Influencers • • Limitations • Cost drivers Capabilities • • Cost drivers • Limitations • Cost drivers • SEPTEMBER 5 - 7, 2018
Airborne Platforms and LiDAR Systems SEPTEMBER 5 - 7, 2018
Different Laser Types for Different Applications SEPTEMBER 5 - 7, 2018
LiDAR Acquisition SEPTEMBER 5 - 7, 2018
System settings Altitude: 1200 feet and up (fixed-wing) Angular Field of View: 0° to 60° Pulse Rate Frequency: How many laser pulses per second? 50 kHz 550 kHz 1000+ kHz SEPTEMBER 5 - 7, 2018
Accuracy influencer: Spot size SEPTEMBER 5 - 7, 2018
Multiple Returns = More Data Typical No. of Returns per Pulse: UAV: Single return • Early LiDAR: Single Return • Terrestrial: Single return • Airborne sensors: Up to 8 returns • Example: 550kHz x 8 returns per pulse = 4,400,000 points per second SEPTEMBER 5 - 7, 2018
Finding the ground SEPTEMBER 5 - 7, 2018
Transmission and Distribution SEPTEMBER 5 - 7, 2018
Limitations Wild Grape Vines Thick Grass (Cogon) SEPTEMBER 5 - 7, 2018
Terrestrial Laser Scanning Tripod-mounted system High-resolution DSLR camera GPS Antenna Onboard or laptop operation Multiple scan positions are stitched High level of detail Smaller projects SEPTEMBER 5 - 7, 2018
Terrestrial Laser Scanning • 122,000 measurements per second • Single Return 100° • 5mm accuracy • 3mm repeatability • 100° Vertical Field of View • 360° Horizontal Field of View 360° • L1 GPS Antenna • High-resolution DSLR camera SEPTEMBER 5 - 7, 2018
Terrestrial Laser Scanning SEPTEMBER 5 - 7, 2018
Terrestrial Laser Scanning 40 millidegrees 20 millidegrees 10 millidegrees 0.040° 0.020° 0.010° 3 minutes 15 minutes 60 minutes SEPTEMBER 5 - 7, 2018
Terrestrial Laser Scanning - Applications • Substations • Short Powerlines • Industrial Surveys • Remote AOI’s • Unsafe AOI’s • ALTA Surveys • Damage Assessment SEPTEMBER 5 - 7, 2018
Unmanned Aerial Systems SEPTEMBER 5 - 7, 2018
Unmanned Aerial Systems - Inspections SEPTEMBER 5 - 7, 2018
Unmanned Aerial Systems – Topo/Volumes SEPTEMBER 5 - 7, 2018
Unmanned Aerial Systems - Limitations SEPTEMBER 5 - 7, 2018
Cost Drivers Manned Aircraft Terrestrial Scanning UAV • Platform • Mobilization • Platform • Mobilization • Project size • Sensor • Project size • Feature complexity • Mobilization • Feature complexity • Cost Savings (no • Project size return trips) • Safety SEPTEMBER 5 - 7, 2018
Summary Airborne LiDAR Ideal for linear facilities and wide-area surveys • High detail suitable for modeling (powerlines, topography) • Mature technology • Terrestrial Laser Scanning Smaller footprint, smaller projects • Finer detail (substations, individual components) • Maturing technology • Unmanned Aerial Systems Small-scale projects (inspection, mapping) • Variety of payloads • Growing technology • SEPTEMBER 5 - 7, 2018
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