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Bathymetric LiDAR – Lessons learned. Andrew Flatman Rune Carbuhn Andersen Data Acquisition Danish Geodata Agency. Danish Geodata Agency - GST. Our earliest experiences with Bathymetrisk LiDAR – 21. Dec. 2007. Opportunity for Bathymetric test 2009-2012.

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bathymetric lidar lessons learned
Bathymetric LiDAR – Lessons learned
  • Andrew Flatman
  • Rune Carbuhn Andersen
  • Data Acquisition
  • Danish Geodata Agency
slide2
Danish Geodata Agency - GST
  • Our earliest experiences with Bathymetrisk LiDAR – 21. Dec. 2007
slide3
Opportunity for Bathymetric test 2009-2012

Why ”Bringing Land and Sea Together”?

  • Goals:
  • Develop a product specification for maritime and terrestrial features
  • Develop a new vertical datum for the North Sea Region
  • Extensive testing of new airborne laser techniques in the coastal zone
  • Deploy, update and test metadatabase
  • Reasons:
  • North Sea nations handle geospatial data independently
  • Little integration of land and sea data
  • Lack of collaboration between countries
  • Increasing pressure on coastal areas
  • Threat of climate change and accelerated sea level rise

WP3: Developing the Marine and Coastal Reference Base

WP4: Harmonisation of Maritime Information

WP6: Climate Change and Integrated Coastal Zone Management (ICZM)

slide4
The GST interest in Bathymetric LiDAR
  • Supplementary Survey techniques…
  • 1. Closing the gap…
  • 2. Classification by waveform…
  • 3. Lakes and streams…
slide5
Test areas
  • 3 different environments:
  • Rødby
  • Flensborg Fjord I & II
  • Hirtshals
slide6
Challenges
  • Maturity – Operators / Systems
  • Local Environment – water and weather
  • http://marcoast.dmi.dk/
slide7
Primary Goal – Closing the Gap (Flensborg Fjord)
  • Lots of rock
  • Hawkeye – deep scan
  • Chiropetera – high density
slide9
Accuracy – control points:

Usual check of topograhic LiDAR but Bathymetric LiDAR?

slide11
Multibeam
  • Depth: 5 meter
  • 3 m
  • Deep scan (3 sechi)
  • Deep Scan - Hawkeye
  • High Density - Chiroptera
distribution
Distribution

Flyingheight: 400 meter

5 meter

distribution in flensburg data
Distribution in Flensburg Data:
  • Back to simple point cloud:
slide14
LiDAR
  • LiDAR bund
  • Multibeam bund
  • Density and penetration
  • LiDAR havoverflade
  • LiDAR bund
preliminary conclusion and lessons learned so far
Preliminary Conclusion and Lessons learned …. so far
  • Accuracy – Horizontal OK, Vertical assumenly OK
  • Density vs Object Recognition - ??
  • Logistic – local environment – a constant challenge in Danish waters
  • Sofware and data processing tools for full waveform - challange
  • Great Model - plenty of use in Coastal Zone Management
  • But for charts ????
slide16
The Road Ahead….
  • Data analyze of Flensburg Fjord and Rødby - general QC
  • Object recognition
  • Cooperation with other organizations (BSH, …)
  • Evaluation of Bathymetric LiDAR for Danish Waters
  • Operational test in Greenland – 2015
  • LiDAR Bathymetry for classification…
  • LiDAR Bathymetry for lakes and streams…
  • ……..
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