Post on 28-Oct-2019
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RICS / THS – SW Region, Plymouth5th May 2009
Hawk Eye II Bathymetric LiDARResults from 2008
First Year of Commercial Operation
Dan SchnurrDirector, Laser Scanning
Blom Aerofilms Limited, UK
Contents
• Short Introduction to Blom
• Summary of LiDAR Bathymetry
• Moving to Commercial Operations
• 2008 – Projects and Results
• 2009 – another year, another survey…
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Who Are The Blom Group?
• A leading provider of geo-referenced data for mapping, navigation and location-based services
• Business concept: capturing / processing / modelling / databases / applications & services
• Market Capitalization: Approximately NOK 0.7 billion (€70m)
• 1,200 employees across Europe
The Blom GroupThe Blom Group
• Europe’s largest aerial survey companyRevenue 2007: Euro 100 millionAccess to capital markets
• Offices in 12 European countriesHead office OsloOver 1,000 highly qualified staff
• Access to the latest technoloy33 aerial survey aircraft & 4 helicopters11 laser scanners (including bathymetric)20 digital & analogue surveys cameras55 Pictometry cameras
• Business conceptAerial acquisitionData processingDatabase creationData delivery
• One stop solution
Blom ASA
Blom Katta
Blom Aerofilms
Blom Spain
Blom Italy
Blom Deutschland
Blom Info
Blom INFO Geonet
Blom Sweden
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Blom Blom resourcesresources
Europe’sEurope’s largestlargest fleetfleet ofof aircraftsaircrafts, , camerascameras and and Lidar instruments for data Lidar instruments for data capturecapture
Business Transformation
2003 2004 2006 2008
• Collecting / Processinggeographical data
• Contracting
• Creating European structure
• Building geographicaldatabases (scalability)
• Multiple sales
• Value chainexpansion
• Developing location-based services
• Developingapplications and services
• Data storage• GPS-enabled handsets• High bandwidth• Graphical processing and display
Key drivers and developments in the market
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Blom Geo Engineering Services (BGES) Blom Information
Services (BIS)
Enhanced PND & Mobile Phone
NavigationBathymetry
CorridorEngineering
Infrastructure, Urban & Rural
Planning
EnvironmentForestry
Hydrology
Online Map Services
Land / Property AdministrationTelecom
EmergencyServices
Applications & Services: Our Market Approach
Defence & Security
Location BasedServices (LBS)
Aerial photography Laser scanning Mapping
3D modelling Bathymetric survey Navigation
Business areasBusiness areas
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Technical Overview of System
• System Design and capabilities
• System calibration• Data Acquisition
AircraftGround Control
• Data Processing
System Design
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System Principle
The Measurement Chain
Sensor controller
Hydro Sensors, 4 pixel, 2 channels
Topo Sensor, 8 pixel
Preamplifiers, TVG
Digitizers 1GHz, 8 bit
Timing circuits
Filter Controllers
Receiver Optics
Imaging, 180 mm aperture
Scanner
Roll, yaw, pitch, altitude, speed and side compensations
Hydro laser
1 kHz, 5 mJ, 5 ns, air cooled, diode pumped
Topo laser
8 kHz, 5ns, IR
Compact PCI
Data storage
Pentium 4 PC
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The Position Chain
The Image Chain
1600 * 1200 pixels, time synchronized with GPS.
Digital Camera
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System Specifications
System Specifications
• Key technical data4 kHz bathymetric data collection (full waveform)64 KHz topographic data collectionSimultaneously bathy and topoImage – Typical 25 cm resolution on groundSwath up to 0.55 times altitudeDepth penetration typical 2-3 times secchi depthTotal system weight < 180 kgPower consumption < 50 A on 28 VDC supply
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System Specifications
Hydro Laser Pixels Topo Laser Pixels
Scan Pattern
2.9m spot 1.45m cells
The return from each green (bathymetric) laser pulse is electronically scanned to produce four soundings per 2.9m spot = 1.45m soundings per pulse
The laser spotThe laser spot
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System Calibration
• Factory CalibrationsLaser alignmentPixel range calibrationAbsolute range calibration
Hydro Laser Pixels
Topo Laser Pixels
System Calibration
• Field CalibrationsPitch, Roll and HeadingAbsolute range in water and on land
• TerramatchIdentify Heading, Roll and Pitch misalignmentsApply corrections to point cloud
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Detection of 2m cubeLake Vättern bathymetry showing the location of the cube
IHO Order 1 complianceIHO Order 1 compliance
Installation in Aero Commander 690
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Airborne Survey
• Automatic Attitude CompensationRemoves effect of aircraft attitude/position errors such as:
• Pitch, Roll and Yaw error• Cross track error• Altitude deviation• Speed deviation
The required overlap between adjacent flight lines is minimized
Airborne Survey
• Pilot monitor Guides the pilot towards the selected flight line
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Ground Control
• GPS Base StationIf no continuously operating station are available
• Ground Control Area (GCA)Multiple 10mx10m areas are surveyed with PPK and used for
data QC
• Sea Control Area (SCA)Multiple 50m x 50m areas are surveyed with single beam (or multibeam) and used for QC
• Secchi Disk measurements• Tide gauge data
Initial data post processing
Measurement data
Reference station
Position data
Reference (RINEX) dataPOSPactrajectory processing
Positions
Coastal Survey Studio
Customer with Coastal Survey Viewer
Point cloud-data
Raw data
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Advantages to Hawk Eye
• 4x the data compared to other systems on the marketMore coverage in less time
• Simultaneous collection of Bathymetric and Topographic dataReduced acquisition timeBetter system calibration
• Attitude compensation includes pilot off track compensationLine spacing can be reduced for more coverage
• High Altitude Upgrade
155kts330m4.5 x 4.5500m
155kts290m4.0 x 4.0450m
155kts220m3.5 x 3.5400m
SPEEDSWATHPOST SPACINGALTITUDE
Moving to Commercial Operations…
• Blom ownership
Majority in 2007 and 100% in 2008
• Issues to solve…Operations…Staffing…Data Processing…
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Improved Airborne Operations Team
• Full staff rotation in with two full teams in place• Global capability, aircraft solution to cover all continents
Processing Capacity 2009
• Core processing staff• Additional staff “on-tap” as required• Processing manager• Technical manager• Processing capacity now over 50sqkm / week
• Deliverable formats & products– CSS raw data (Point cloud & wave
form)– Gridded DTM & DEM– Ortho photos– Charting– Reflectance
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Projects undertaken in
• France• Sweden• Finland• Taiwan• United States• Germany• Denmark• Norway• UK• Ireland• Spain• Australia
• Environment and Habitat
• Coastal Engineering
• Nautical Charting
Hawk Eye Hawk Eye –– Applications and ProjectsApplications and Projects
USASpain
ROW
France Ireland
Sweden
Denmark
GermanyUK
A high density Bathymetric LiDAR survey of 3 priority bays on thA high density Bathymetric LiDAR survey of 3 priority bays on the west coast of Ireland was carried out for GSI as part of the e west coast of Ireland was carried out for GSI as part of the integrated mapping for the sustainable development of Irelands mintegrated mapping for the sustainable development of Irelands marine resource. The accuracy was better than arine resource. The accuracy was better than ±±25cm; 2m 25cm; 2m post spacing with Shoal bias xyz for the whole area. Sun illuminpost spacing with Shoal bias xyz for the whole area. Sun illuminated images and charting was produced for the project along ated images and charting was produced for the project along with full color 25cm GSD orthophotos for all 3 bays.with full color 25cm GSD orthophotos for all 3 bays.
€€300,000300,000Value:Value:Hawk Eye MKIIHawk Eye MKIISensor:Sensor:GSIGSIClient:Client:
20082008Date:Date:Charting / CoastalCharting / CoastalApplication:Application:Seabed mapping of IrelandSeabed mapping of IrelandProject:Project:
ApplicationApplication––Charting / CoastalCharting / Coastal
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A high density Bathymetric LiDAR survey of 3 areas around the soA high density Bathymetric LiDAR survey of 3 areas around the south and east coast of Taiwan was required for the Ministry uth and east coast of Taiwan was required for the Ministry of Interior in Taiwan. The sites were selected to best promote tof Interior in Taiwan. The sites were selected to best promote the capability of the Hawkeye system and the project was seen he capability of the Hawkeye system and the project was seen as a precursor to a larger bathymetry project in 2010. The delivas a precursor to a larger bathymetry project in 2010. The deliverables required for the client included bathymetric and erables required for the client included bathymetric and topographic points clouds and 25cm GSD orthos photos.topographic points clouds and 25cm GSD orthos photos.
€€270,000270,000Value:Value:Hawk Eye MKIIHawk Eye MKIISensor:Sensor:Ministry of Interior (MOI)Ministry of Interior (MOI)Client:Client:
20082008Date:Date:Coastal mappingCoastal mappingApplication:Application:TaiwanTaiwanProject:Project:
ApplicationApplication––Coastal mappingCoastal mapping
The end clients were specifically interested the Hawk Eye MKII sThe end clients were specifically interested the Hawk Eye MKII system capability and accuracy, so agreed project areas near ystem capability and accuracy, so agreed project areas near the Iberian peninsular in the south and the Bay of Biscaythe Iberian peninsular in the south and the Bay of Biscay in the north of Spain were flown. The required accuracy was IHOin the north of Spain were flown. The required accuracy was IHOOrder 1 flown at 300m to give a final post spacing of 0.5 Order 1 flown at 300m to give a final post spacing of 0.5 –– 0.8m on land and 1.8 0.8m on land and 1.8 –– 3.3m in the sea for INTA. The clients for the 3.3m in the sea for INTA. The clients for the northern projects were interested in the comparison of existing northern projects were interested in the comparison of existing topographic and bathymetric LiDAR captured prior, with the topographic and bathymetric LiDAR captured prior, with the current data acquired by the Hawkeye MKII system. A comparative current data acquired by the Hawkeye MKII system. A comparative study was required highlighting all results. Results from study was required highlighting all results. Results from INTA and INTA and GaztelugatxeGaztelugatxe can be seen below.can be seen below.
€€250,000250,000Value:Value:Hawk Eye MKIIHawk Eye MKIISensor:Sensor:Various Inc INTA, AZTIVarious Inc INTA, AZTIClient:Client:
20082008Date:Date:Inter coastal zone mappingInter coastal zone mappingApplication:Application:Spanish coastal mappingSpanish coastal mappingProject:Project:
Application Application –– Inter coastal zone mappingInter coastal zone mapping
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Application – Coastal Margin
An airborne Bathymetric LiDAR survey was carried out in BrittanyAn airborne Bathymetric LiDAR survey was carried out in Brittany, France to produce a DEM of the seabed surface. Blom , France to produce a DEM of the seabed surface. Blom Aerofilms completed the project of the two estuary areas in St Aerofilms completed the project of the two estuary areas in St MaloMalo and and MorlaixMorlaix, and produced the final tiled DEMs to the , and produced the final tiled DEMs to the required Lambert 93 projection.required Lambert 93 projection. The Survey produced a DEM of the seabed surface and the surroundThe Survey produced a DEM of the seabed surface and the surrounding littoral zone. ing littoral zone. Blom Aerofilms also undertook a FCIR imagery survey of the area Blom Aerofilms also undertook a FCIR imagery survey of the area using the Vexcel UltraCAM, processed this imagery and using the Vexcel UltraCAM, processed this imagery and bathymetric LiDAR data to produce the final tiled DEMs and orthobathymetric LiDAR data to produce the final tiled DEMs and orthos to the required Lambert 93 projection.s to the required Lambert 93 projection.
€€140,000140,000Value:Value:Hawk Eye MKIIHawk Eye MKIISensor:Sensor:IFREMERIFREMERClient:Client:
20082008Date:Date:Coastal Margin survey Coastal Margin survey Application:Application:Brittany bathymetric LiDARBrittany bathymetric LiDARProject:Project:
Brittany bathymetric LiDAR data
Project Results, Example 1
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Project Results, Example 2
System Upgrades Completed 2008
• Multiple pulse return for topographic Laser – 1st, 2nd, 3rd and last return now captured and processed for increased vegetation penetration along the shoreline
• POS/AV 510 with Sagem IMU• High altitude upgrade to allow cost effective medium resolution
surveys at 500m (1500ft) above ground / sea surface level
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Hawk Eye II – System Upgrade Options 2009
• Integration of Raman ChannelImproved water surface detection
• Improved field magnification in Green channelsSimplifies the system settings in the air (less sensitive to variations in the water conditions)
• Improved temperature compensation of the topographic receiver opticsHigher sensitivity in the topographic channels
• Improved constant fraction board for topographic pulse detectionIncludes pulse energy integration
• Changed wavelength of the topographic laser from 1064 Nm to 1030 Nm)Improved topographic sensitivity
• Integration of sensor intoone mechanical frame
More robust cabling between sensor controlunit and sensor head (internal cabling only)Reduced total weight (from 180 kg to 140 kg)Easier serviceability of the sensor
• New camera with higher resolution (16 MP)Improved image quality
islade@blomaerofilms.com
Thank YouAny questions?