Bathymetric lidar lessons learned
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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

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Bathymetric lidar lessons learned

Bathymetric LiDAR – Lessons learned

  • Andrew Flatman

  • Rune Carbuhn Andersen

  • Data Acquisition

  • Danish Geodata Agency


Bathymetric lidar lessons learned

  • Danish Geodata Agency - GST

  • Our earliest experiences with Bathymetrisk LiDAR – 21. Dec. 2007


Bathymetric lidar lessons learned

  • 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)


Bathymetric lidar lessons learned

  • The GST interest in Bathymetric LiDAR

  • Supplementary Survey techniques…

  • 1. Closing the gap…

  • 2. Classification by waveform…

  • 3. Lakes and streams…


Bathymetric lidar lessons learned

  • Test areas

  • 3 different environments:

  • Rødby

  • Flensborg Fjord I & II

  • Hirtshals


Bathymetric lidar lessons learned

  • Challenges

  • Maturity – Operators / Systems

  • Local Environment – water and weather

  • http://marcoast.dmi.dk/


Bathymetric lidar lessons learned

  • Primary Goal – Closing the Gap (Flensborg Fjord)

  • Lots of rock

  • Hawkeye – deep scan

  • Chiropetera – high density


Deep scan 3 sechi vs high density 1 sechi

Deep scan (3 sechi) vs High density (1 sechi)

  • High densitiy (1 sechi)


Bathymetric lidar lessons learned

  • Accuracy – control points:

Usual check of topograhic LiDAR but Bathymetric LiDAR?


Bathymetric lidar lessons learned

  • Accuracy: control points and object detection


Bathymetric lidar lessons learned

  • 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:


Bathymetric lidar lessons learned

  • 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 ????


Bathymetric lidar lessons learned

  • 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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