![ㅁENC Coastal
ㅁENC Approach
[..] SINAA destinations
[..] NUNALIK destinations](https://image.slidesharecdn.com/csbwg9-dga-chs-tcsbwhitepaper-200703091349/85/Trusted-Crowd-Sourced-Bathymetry-Project-8-320.jpg)
![NONNA-100
[..] SINAA destinations
[..] NUNALIK destinations](https://image.slidesharecdn.com/csbwg9-dga-chs-tcsbwhitepaper-200703091349/85/Trusted-Crowd-Sourced-Bathymetry-Project-9-320.jpg)
![CA373417 Cape Prince
of Wales to Davies
Island
ㅁENC Coastal
NONNA-100
[..] SINAA destinations](https://image.slidesharecdn.com/csbwg9-dga-chs-tcsbwhitepaper-200703091349/85/Trusted-Crowd-Sourced-Bathymetry-Project-10-320.jpg)
![ㅁENC Coastal
ㅁENC Approach
NONNA-100
[..] Sedna destinations](https://image.slidesharecdn.com/csbwg9-dga-chs-tcsbwhitepaper-200703091349/85/Trusted-Crowd-Sourced-Bathymetry-Project-11-320.jpg)
Trusted Crowd-Sourced Bathymetry Project
- 1. “Trusted Crowd-Sourced Bathymetry” Project From the Trusted Crowd to the Chart 9th MEETING OF THE IHO CROWDSOURCED BATHYMETRY WORKING GROUP STAVANGER, NORWAY, 29 JUNE – 2 JULY 2020 G. Masetti, M. Rondeau, B.J. Barón, P. Wills, Y.M. Petersen, J. Salmia Danish Geodata Agency Canadian Hydrographic Service
- 3. Problem Statement ● Monitor the maritime territory ● Increase knowledge of the oceans ● Special focus on the Arctic region Supervise Collection of Spatial Data Facilitate Data Distribution & Accessibility Leverage cooperation and synergy with existing infrastructures and activities: Trusted Crowd-Sourced Bathymetry High Cost/Efforts of Traditional Surveying More & Timely-Collected Hydrographic Data vs.
- 4. Trusted What is Bathymetric Crowdsourcing? “The collection of depth measurements from vessels, using standard navigation instruments, while engaged in routine maritime operations.” (IHO B-12 v.2.0.3)
- 5. Why a Trusted Crowd? Trusted CSB “CSB where relevant efforts are dedicated to support the collectors, as well as in monitoring the quality of the collected data, by comparison with other collectors and more credible sources.” ● Constant data stream with better quality than basic CSB collectors ● Limiting low-quality data to keep high the agency responsiveness
- 6. How to Build a Trusted Crowd? ● Targeted partners (sailing in zones of interest) ● Open data loggers ○ Low cost (~3000 €) ○ High performing (GNSS, multi freq; pitch/roll; communication) ○ Calibrated ● Open automated data workflow ○ Acquisition ○ Validation & Analysis
- 8. ㅁENC Coastal ㅁENC Approach [..] SINAA destinations [..] NUNALIK destinations
- 9. NONNA-100 [..] SINAA destinations [..] NUNALIK destinations
- 10. CA373417 Cape Prince of Wales to Davies Island ㅁENC Coastal NONNA-100 [..] SINAA destinations
- 11. ㅁENC Coastal ㅁENC Approach NONNA-100 [..] Sedna destinations
- 12. Data loggers → Trusted Soundings
- 13. Data loggers → Trusted Soundings Ref: Rondeau, M., and Dion, P., “Potential of a HydroBox crowd-sourced bathymetric data logger to support the monitoring of the Saint-Lawrence Waterway”, Canadian Hydrographic Conference 2020.
- 14. Ref: G. Masetti, Kelley, J. G., Johnson, P., and Beaudoin, J., “A Ray-Tracing Uncertainty Estimation Tool for Ocean Mapping”, IEEE Access, vol. 6. IEEE, pp. 2136 - 2144, 2017. SSP from models (Smart Map) CA373417 Cape Prince of Wales to Davies Island
- 15. Data loggers (calibrated) 1) Z axis is calibrated on a flat and known as stable seabed 2) X axis is calibrated on a series of bumps and hollows known as stable (no dunes)
- 17. 1) Z axis is calibrated on a flat and known as stable seabed
- 18. 2) X axis is calibrated on a series of bumps and hollows known as stable (no dunes)
- 20. Interpolated bathymetric surface (5m resolution). Soundings reduced to CD. Data collected in January, 2020
- 21. TCSB Data Analysis → Chart Adequacy Tools Open-source tool that performs chart adequacy tasks by comparing TCSB data and current ENC portfolio Ref: Masetti, G., Faulkes, T., and Kastrisios, C., “Automated Identification of Discrepancies Between Nautical Charts and Survey Soundings”, ISPRS International Journal of Geo-Information, vol. 7, p. 392, 2018.
- 22. Point cloud from several features in the input ENC: ● SOUNDG points. ● DEPCNT lines with valid VALDCO attribute. ● DRGARE polygons with valid DRVAL1 attribute. ● Point features with valid VALSOU attribute. ● COALNE and SLCONS lines. ● DEPARE polygons (only for ENC cell boundaries). Augmented by interpolating the linear features (at 1 cm @ compilation scale).
- 25. TCSB sounding
- 27. Chart Comparison → Tilted Triangle Ref: Masetti, G., Faulkes, T., and Kastrisios, C., “Automated Identification of Discrepancies Between Nautical Charts and Survey Soundings”, ISPRS International Journal of Geo-Information, vol. 7, p. 392, 2018.
- 28. Ref: Masetti, G., Faulkes, T., and Kastrisios, C., “Automated Identification of Discrepancies Between Nautical Charts and Survey Soundings”, ISPRS International Journal of Geo-Information, vol. 7, p. 392, 2018.
- 29. TCSB Data in Hydrographic Office Workflow Trusted Crowd Data Validation(*) Calibration & Offsets Verification Analysis & Chart Adequacy Outputs HO’s Production Teams ENC Portfolio SSP from models (*) HO-managed Trusted Node (compatible with IHO B-12 Trusted Node Model)
- 30. Next Steps ● Identify Industry/Research/Agency partner(s): ○ Evaluate open data logger devices → Quality vs. Price balance ○ Explore communication solutions → Tracking/Data Exchange ○ Develop an open workflow for data analysis → GitHub repo ● Showcase chartable TCSB data
- 31. Questions? For comments and suggestions: gimas@gst.dk, mathieu.rondeau@dfo-mpo.gc.ca Danish Geodata Agency Canadian Hydrographic Service