From CSIRO Marlin
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

RV Linnaeus Voyage LI2019_V01 EM2040c Multibeam Echosounder Data

Created 25/06/2025

Updated 25/06/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

This record describes multibeam echosounder data collected on RV Linnaeus voyage LI2019_V01, 'Ningaloo Deepwater Reefs Hydrographic Survey' which departed Hillary's Boat Harbour, Perth, WA on the 15th March 2019 and concluded at Coral Bay, WA on the 29th March 2019. The Kongsberg EM2040c multibeam echosounder (single transceiver) was used to acquire seafloor bathymetry and backscatter information (and watercolumn backscatter) offshores of Ningaloo Reef, WA. Transit data to and from nightly anchorages has also been recorded. The EM2040c provides a 1.3° by 1.3° transmit and receive angular resolution respectively (single transceiver). The echosounder's nominal frequency range was 200 kHz and it was operated in dual swath mode. Data are stored in .all raw format for bathymetry and backscatter and .wcd format for watercolumn backscatter at CSIRO. There are 140 files totalling 32.5 GB of raw .all data, and 103 files totalling 178 GB of raw .wcd in the dataset. Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in .all format are corrected for motion and position. Tide corrections were applied to the processed data in Caris using a GPS Tide based on the Applanix PosMV and Marinestar G4+ Ellipsoidal ht and thereafter reduced to AHD (Australian Height Datum) using a AusGeoid09 model. Processed data has had outliers removed. Processed line data are available in .gsf and ascii format, and processed bathymetry and backscatter grids in geotiff format. Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request. The raw data is offline but is available on request.

Files and APIs

Additional Info

Field Value
Title RV Linnaeus Voyage LI2019_V01 EM2040c Multibeam Echosounder Data
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/a1180e98-b9b0-4e90-ad6f-19a5f3c25d6b
Contact Point
CSIRO Marlin Data Catalogue
data-requests-hf@csiro.au
Reference Period 11/10/2019
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        113.25,
        -23.5
      ],
      [
        114.0,
        -23.5
      ],
      [
        114.0,
        -22.5
      ],
      [
        113.25,
        -22.5
      ],
      [
        113.25,
        -23.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal CSIRO Marlin

Data Source

This dataset was originally found on CSIRO Marlin "RV Linnaeus Voyage LI2019_V01 EM2040c Multibeam Echosounder Data". Please visit the source to access the original metadata of the dataset:
https://marlin.csiro.au/geonetwork/srv/eng/csw/dataset/rv-linnaeus-voyage-li2019_v01-em2040c-multibeam-echosounder-data