MBES and Laser Scanning Data Progress on Processing Challenges

Workshop HSB

Saturday 8 April 2023 Geo Plus

MBES and Laser Scanning data

Progress on processing challenges

Niels WienkeSenior Hydrographic Surveyor

From acquisition to visualisation


Acquisition: high quality data

Processing: softwarevalidationinterpretation

Visualisation: purpose of dataanalyse

Footprints jack-up Eemshaven

AcquisitionMultifunctional survey vessels


Functions:• Bathymetric en geophysical surveys• Combining sensors• Fast Crew tender• Prepared for temporary installation

of additional equipment (OTS/Tow)

Challenge:• Combining functions with the

leastpossible compromises

• Dealing with air

MBES - Dealing with airKongsberg Product Seminar


Dealing with airKongsberg Product Seminar






Dealing with airMARIN - hydrodynamics


LaserscanMobile system on its own platform


LaserscanArgo 8x8 amphibious vehicle


ProcessingSoftware


Capabilities:• Large datafiles – laser: 300.000 pts/s• Validation of data• Analysing data• Visualisation of data

Challenge:How to process the huge amount of data to a useful product

ProcessingSoftware


• Every product needs its own working method!• Combination of different kinds of software• Procedures for specific products• Research and development• Partners

ProcessingSituations


Multibeam• Bathymetric surveys• Stone dumps• Cablelaying and pipelines

Laserscanner• Monitoring breakwaters• Inspections survey• Bridge clearance

Challenge: combining data from different sensors


Multibeam: Kongsberg EM2040


Kongsberg EM2040

Normal mode – 300 kHz


Processing

Cleaning data:

- Manual- Filter methods- Area based editing- CUBE


Processing

CUBE - Combined Uncertainty and Bathymetry Estimator

- Error based model – estimates depth along with a confidance interval- Automatically cleaning most of the data- Generating hypotheses for the operator to review

Error sources and sizes should be known• Systematic errors• Blunders• Uncertainty


CUBE (Fledermaus)


CUBE (Fledermaus)


CUBE (Fledermaus)


FledermausVisualising Sonar Watercolumn data


FledermausVisualising Sonar Watercolumn data


Laserscan – bridge clearance



Challenges:• Quality of data – provable• Minimum height - profile

Software• Leica cyclone – check quality, selecting points, profiling• 3D reshaper – processing and polygonal mesh (3D model)






EM2040 – Laser combinationRecording status - monitoring

Photo

Laser

Multibeam


EM2040 – Laser combination


Mobile mapping video• Technology cluster• Research sonar processing with

- Horus view and explore- TNO Intelligent Imaging- Geo Plus

Integration and visualisation of underwaterand above water images and data


Mobile mapping video• 360° georeferenced video• Multi sensor: - Multibeam data

- Side scan sonar- Laser- Infrared- GIS / Cad topography

• Inspection – monitoring situations• Free Horus movie player

Saturday 8 April 2023 Geo Plus B.V.






EU

RP

res2

0120

087

– F

C –

170

9/20

12

Ghent University, Belgium, September 17 – 20, 2012

37

Block settling between 2011 and 2012


Conclusions

• Every kind of measurement / project needs its own processing method

• Combining software creates a new level of visualisation

• Innovative techniques can help processing• Research and improvements of software is

needed for dedicated situations

Questions?


Documents

MBES and Laser Scanning Data Progress on Processing Challenges