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Data Level
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Notes
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AusSeabed Hub
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Data Requirements
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L0
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L0 – Raw Data
L0 data is native format, as recorded by the sensor. It should include all necessary datagrams required for a comprehensive bathymetry and backscatter processing, including raw backscatter per beam (BA) and raw backscatter in time series (TS), and all required ancillary data. Water column data if collected should be stored in a separate file.
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· MBES proprietary format e.g. *. all for Kongsberg, *.s7k for Reson and *.gsf (possibly .XTF) for all other MBES system including R2Sonic
· WC over wrecks (*.wcd)
· Applanix POSMV or proprietary format of any aux sensor used e.g. TerraPos, Starfix etc
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L1
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L1 – Georeferenced Point Data - uncleaned
L1 Data is raw data processed to form a georeferenced bathymetric point cloud with no cleaning
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Nil
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L2
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L2 – Georeferenced Point Data – Fully Cleaned
L2 data will be cleaned relative to the CUBE Surface.
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· MBES: HDCS (LAT) plus backscatter
· SVP: *.svp or *.asvp or *.txt (of those used to produce L2)
· Tide: *.tid or (*.zdf & *.tid)
· Navigation SBET
· GA to generate: .gsf to ellipsoid
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L3 v.0
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L3 Gridded Final Survey Product data
L3 is the delivered Final Survey Data for a survey. L3 will be a CSAR CUBE / SDTP surface, which will include density and uncertainty.
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Nil
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L3 v.1
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L4 – Verified Final Survey Data
L4 Data is the final Survey Surface that is verified and accepted by the contributing organisation.
· BAG single-resolution (MSL)
· Csar (MSL)
· GA to generate:
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BAG multi-resolution (MSL)
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AusSeabed is adopting the concept of data levels taken from the Satellite industry to describe the level of processing that has been undertaken for the bathymetry data being submitted. Further information is contained within the Multibeam Guidelines, section 2.3.1.
AusSeabed encourages Data Contributors to provide the highest level of data possible along with all supporting levels i.e. when supplying an L3 Gridded Bathyemtry Product for publication on the AusSeabed Portal, please supply the underlying L2 Processed data, the L0 Raw Sensor data and the Survey metadata and reports.
Detailed Product Specifications for all Data Packages from Survey, L0 Raw, L2 Processed and L3 Gridded can be found here:
Australian Multibeam Guidelines - Linked Excerpt
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