LiDAR Surveying and the UAS Phenomena: Understanding How to See the - - PowerPoint PPT Presentation

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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

SLIDE 1

SEPTEMBER 5 - 7, 2018

LiDAR Surveying and the UAS Phenomena:

Understanding How to “See the Wood for the Trees”

SLIDE 2

SEPTEMBER 5 - 7, 2018

Airborne LIDAR

Platforms
LiDAR Types
Scan Patterns
Acquiring LiDAR
Accuracy Influencers
Capabilities
Limitations
Cost drivers

Terrestrial Laser Scanning

Applications
Collecting Data
Accuracy Influencers
Capabilities
Limitations
Cost drivers

Unmanned Aerial Systems

Platforms
Payloads
Data
UAS and LiDAR
Accuracy Influencers
Capabilities
Limitations
Cost drivers

SLIDE 3

SEPTEMBER 5 - 7, 2018

Airborne Platforms and LiDAR Systems

SLIDE 4

SEPTEMBER 5 - 7, 2018

Different Laser Types for Different Applications

SLIDE 5

SEPTEMBER 5 - 7, 2018

LiDAR Acquisition

SLIDE 6

SEPTEMBER 5 - 7, 2018

Pulse Rate Frequency: How many laser pulses per second? 50 kHz 550 kHz 1000+ kHz Altitude: 1200 feet and up (fixed-wing) Angular Field of View: 0° to 60° System settings

SLIDE 7

SEPTEMBER 5 - 7, 2018

Accuracy influencer: Spot size

SLIDE 8

SEPTEMBER 5 - 7, 2018

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

Multiple Returns = More Data

SLIDE 9

SEPTEMBER 5 - 7, 2018

Finding the ground

SLIDE 10

SEPTEMBER 5 - 7, 2018

Transmission and Distribution

SLIDE 11

SEPTEMBER 5 - 7, 2018

Thick Grass (Cogon)

Limitations

Wild Grape Vines

SLIDE 12

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

SLIDE 13

SEPTEMBER 5 - 7, 2018

Terrestrial Laser Scanning

100° 360°

122,000 measurements per second
Single Return
5mm accuracy
3mm repeatability
100° Vertical Field of View
360° Horizontal Field of View
L1 GPS Antenna
High-resolution DSLR camera

SLIDE 14

SEPTEMBER 5 - 7, 2018

Terrestrial Laser Scanning

SLIDE 15

SEPTEMBER 5 - 7, 2018

Terrestrial Laser Scanning

40 millidegrees 0.040° 3 minutes 20 millidegrees 0.020° 15 minutes 10 millidegrees 0.010° 60 minutes

SLIDE 16

SEPTEMBER 5 - 7, 2018

Terrestrial Laser Scanning - Applications

Substations
Short Powerlines
Industrial Surveys
Remote AOI’s
Unsafe AOI’s
ALTA Surveys
Damage Assessment

SLIDE 17

SEPTEMBER 5 - 7, 2018

Unmanned Aerial Systems

SLIDE 18

SEPTEMBER 5 - 7, 2018

Unmanned Aerial Systems - Inspections

SLIDE 19

SEPTEMBER 5 - 7, 2018

Unmanned Aerial Systems – Topo/Volumes

SLIDE 20

SEPTEMBER 5 - 7, 2018

Unmanned Aerial Systems - Limitations

SLIDE 21

SEPTEMBER 5 - 7, 2018

Cost Drivers Manned Aircraft

Platform
Mobilization
Project size
Feature complexity

Terrestrial Scanning

Mobilization
Project size
Feature complexity
Cost Savings (no

return trips)

Safety

UAV

Platform
Sensor
Mobilization
Project size

SLIDE 22

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