Metaquality
Definition
Metaquality refers to the accompanying information used to describe the collection, scope, requirements in the data during acquisition and delivery.
A minimum set of metadata is required to perform QA checks:
Checks
Minimum metadata present with the dataset.
Recommended metadata present.
Optional metadata present.
Pass Requirements
Depending on the metadata received with the dataset:
A pass will require all the minimum metadata.
A good rating will require all the minimum and some of the recommended metadata.
A Very good rating will require all the minimum and all of the recommended metadata.
An excellent rating will require all the minimum, all of the recommended metadata and all the optional metadata.
Failed: if metadata received does not contain the minimum metadata fields.
Recommended metadata fields are required depending on the data level.
L0 (raw data) needs fields 13 to 17 from the table below (Number of sensor heads for the survey, sensor number of beams, sensor transducer degree, sensor Receiver degree, sensor acquisition mode) for processing.
L3 (processed grid) does not need fields 13 to 17 to publish and can be considered as optional.
Metadata Levels
Preferred Name | Source | Definition | Example |
1- Survey Title | Data Supplier | Survey Name or Project as supplied by the Contributor | RV Investigator Voyage IN2019_T03 |
2- Survey ID | Data Supplier | The ID assigned to the survey by the Collecting organisation | IN2019_T03, GA4870/FK210409 |
3- Abstract | Data Supplier | Narrative summary of the survey including survey purpose |
Geoscience Australia undertook a marine survey of the Leveque Shelf (survey number (GA-0340/SOL5754), a sub-basin of the Browse Basin, in May 2013 onboard the RV Solander using a Kongsberg EM2040 multibeam sonar. The bathymetry survey was led by Dr. Scott Nichol (Geoscience Australia). This survey provides seabed and shallow geological information to support an assessment of the CO2 storage potential of the Browse sedimentary basin |
4- Lineage | Data Supplier | Provenance Information and references for sources and processes that were used to create the Survey/Dataset | The Leveque Shelf Survey, GA-0340 SOL5754 was acquired by Geoscience Australia onboard the RV Solander from the 01st of May to the 30th of May 2013. The Chief scientist onboard was Dr. Scott Nichol and Dr. Riko Hashimoto. This dataset was acquired and processed onboard by Justy Siwabessy, Kim Picard and Olivia Wilson and further processing was conducted in the office by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2. 1. First a vessel configuration file was created where the co-ordinates of the motion sensor and DGPS antenna and patch test offsets were recorded. 2. A new project was then created and the vessel configuration file was attached to the project file. 3. The raw swath sonar data, in raw.all format, for each line was then imported into the project and the vessel information assigned to the data. 4. The motion sensor, DGPS and heading data were then cleaned using a filter that averaged adjacent data to remove artifacts. 5. Different sound velocity profiles data for each block were attached to the corresponding raw swath sonar data files to correct the depths for changes in the speed of sound through the water column. 6. Then a new blank field area was defined that specified the geographic area of study and the co-ordinate system used. The co-ordinates for the study areas were WGS84 UTM-51S. 7. The data was cleaned by applying several filters that removed any remaining spikes in the bathymetry data using user defined threshold values. A visual inspection of the data for each line was then undertaken where artifacts and noisy data not removed by the filtering process were removed manually using Swath and subset editors modules of the Caris HIPS/SIPS software. 8. All the data for each bathymetric, motion sensor, DGPS, heading, tide and sound velocity profile data were merged to produce the final processed data file. A weighted grid of the processed data was then created for each Block. In GA the tide was applied to the grid to correct for tidal variations and velocity corrections were performed to correct for different artifacts and mismatches. 9. The processed data was finally exported as grids soundings or false colored images for presentation and reporting and as final processed data in ASCII XYZ at the optimum resolution the data can provide. 10. Hips file created from steps 1-9 was opened into CARIS HIPS & SIPS 11.3 to import all survey lines and a 3 m resolution, regular gridded surface was created. 11. The final processed grid was exported as a 32 bit Geotif format at 3 m resolution, georeferenced to EGM2008 vertical datum and EPSG:4326 coordinate system. |
5- Data Owner | Data Supplier | The person and/or organisation that owns the submitted data for the purpose of empowering AusSeabed to act as custodian | Commonwealth of Australia - Geoscience Australia |
6- Custodian | Data Supplier | The person and/or organisation that owns the submitted data for the purpose of empowering AusSeabed to act as custodian | Commonwealth of Australia - Geoscience Australia |
7- Country | Data Supplier | The country that owns the data, not the country where the data is collected. | Australia (https://www.iso.org/obp/ui/#iso:code:3166:AU) |
8- Principal Investigator | Data Supplier | The key point of contact, often the Lead Scientist on the survey | Mike.Hoffin@abc.org, ph. +61 2 6211 1234 |
9- PI Contact Details | Data Supplier | Contact details for Principal Investigator, (email and phone minimum requirements) | Australia (https://www.iso.org/obp/ui/#iso:code:3166:AU) |
10- Collecting Entity | Data Supplier | The person and/or organization that owns the submitted data for the purpose of empowering AusSeabed to act as custodian | CSIRO; Deakin |
11- Attribution Citation/ citation | Data Supplier / Contrib Hub | Statement of attribution that must be included whenever the data being provided is distributed/redistributed or used by another organization. | 2021. Bill and Ben Plateaux bathymetry survey (FK210206/GA4869). Geoscience Australia, Canberra. |
12- Legal Constraints | Data Supplier | The URL to a standard or specific licence, enter "CCBY 4.0", "Freely Distributed" or "None", or describe any restrictions to data access and distribution in free text. | |
13- Access constraints | Data Supplier | Details of any constraints that are not determined under the licence constraints regarding the access to the information being provided. Access constraints are applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations on obtaining the resource or metadata
| As per license |
14- Use Constraints | Data Supplier | special restrictions or limitations on obtaining the resource or metadata | As per license |
15- Survey area (general) | Data Supplier | Description of the location of the survey. | Indian ocean approximately 1100nm off the coast of Perth Australia. |
16- Min X | Data Supplier | The most western X value of the survey area, used to define a bounding box (units as defined by the CRS) | +78 |
17- Max X | Data Supplier | The most eastern X value of the survey area, used to define a bounding box (units as defined by the CRS) | +116 |
18- Min Y | Data Supplier | The most northern Y value of the survey area, used to define a bounding box (units as defined by the CRS) | -12 |
19- Max Y | Data Supplier | The most southern Y value of the survey area, used to define a bounding box (units as defined by the CRS) | -42 |
20- Bounding Box CRS | Data Supplier | The Coordinate Reference Systems (EPSG) used to define the Bounding Box. The CRS defines the projection, zone if applicable and Horizontal datum. Some CRS include the Vertical datum. | EPSG:4326 (based on WGS84) |
21- Survey Feature CRS | Data Supplier | The Coordinate Reference Systems (CRS) (geodetic) used to define the Feature Geometry. The CRS defines the projection, zone if applicable and Horizontal datum. Some CRS include the Vertical datum. | EPSG:4326 (based on WGS84) |
22- Geodetic Datum of the Survey | Data Supplier | The reference datum of the data collected | WGS 84 |
23- Horizontal Datum | Data Supplier | The horizontal reference datum configured in the operating parameters | UTM |
24- Vertical Datum | Data Supplier | Identify the vertical control, if Tides Applied (supply tide file), or Geoid Tide details (supply model) | MSL, Tides Applied |
25- Platform Name | Data Supplier | Registered Name or TagID of the ship, vessel, plane, satellite, etc | Investigator, Bluefin |
26- Platform Type | Data Supplier | The platform hosting the instruments and sensors used to collect the data. e.g. Ship / Research Vessel / AUV / Satellite / Drone / Plane. | Research Vessel, Fishing Vessel |
27- Instrument Type | Data Supplier | The family of sensors described (Multibeam, Single-beam, LADS, etc) | Multibeam echo sounder |
28- Sensor Brand Model | Data Supplier | The brand and model of the sensor (Kongsberg EM2040c) | Kongsberg EM710 |
29- Sensor Frequency (kHz) | Data Supplier | Operating frequency measured in kHz. | 100
|
30- Auxiliary Sensors | Data Supplier | Brand model of auxiliary sensors | Navigation: CNAV; Attitude: POSMV |
As mentioned in the definition paragraph: if we received L0 (raw dataset) some extra required metadata is needed for processing if vessel configuration file is not delivered:
Number of heads.
Number of beams/soundings.
Transmitter beam width (0.5x1, 1.5 or 2 degrees).
Receiver beam width (0.5x1, 1.5 or 2 degrees).
All parameters as required by the processing software for the creation of the vessel configuration file such as: Normal mode versus single sector for (EM2040), High resolution for (Teledyne Reson SeaBat T50P and depth range for Reson SeaBat 8160)
Preferred Name | Source | Definition | Example |
1- Keywords |
| Keywords or Tags used to aid search and discovery. It is Recommended to have Earth Science Oceans and at least one Data Type that is associated with the Survey. Contributions to AusSeabed will also automatically have ‘AusSeabed’ added as a keyword. | Marine, bathymetry, multibeam, bathymetric grids, AusSeabed, HVC_144641. |
2- Data Collected | Data Supplier | Multiple responses identifying the data types collected. | Bathymetry | Backscatter | Sound Velocity Profile SVP | Acoustic Water Column WCD | Raw Navigation | Tide | Vessel Configuration | Sub bottom Profile | Sidescan | Imagery | Video | Physical Properties | Samples |
3- Start Location | Data Supplier | The location, departure point or Port the survey or entire data collection started from | Henderson, WA |
4- End Location | Data Supplier | The location, arrival point or Port the survey or entire data collection ended at | Hobart, TAS |
5- Start DateTime | Data Supplier | The Date and Time the Survey or the specific data collection commenced in local time to be converted to UTC for storage | 26-AUG-2020 2PM (2020-08-26T14:00:00Z) |
6- End DateTime | Data Supplier | The Date and Time the Survey or the specific data collection ended in local time to be converted to UTC for storage | 11-SEP-2020 2PM (2020-09-11T14:00:00Z) |
7- Bounding Box Coordinate Epoch | Derivable | Temporal metadata. Recording the Coordinate Epoch is important for propagating coordinates through time when data is gathered on a dynamic datum such as the Australian Terrestrial Reference Frame (ATRF2014) - This field can be Derived from Start and End DateTimes captured for the Survey. | 2020-08-26T14:00:00Z - 2020-09-11T14:00:00Z |
8- Survey Feature Geometry Line | Data Supplier | The preferred and alternative shape/geometry to a Bounding Box for the Survey area. A clean, generalised line that identifies the track of the platform/ship from start to end (port to port) | Line (as supplied in an ESRI Shapefile, Personal Geodatabase or in GML, WKT or GeoJson) |
9- Survey Feature Geometry Poly | Data Supplier | The preferred and alternative shape/geometry to a Bounding Box for the Survey area. A clean, generalised polygon that sufficiently encompasses the area of the survey for all data types collected. | Polygon (as supplied in an ESRI Shapefile, Personal Geodatabase or in GML, WKT or GeoJson) |
10- Metadata URL | Contrib Hub | The URL to a specific online metadata record held by the Custodian. | [eCat_145179](http://pid.geoscience.gov.au/dataset/ga/145179 ) |
11- Dataset URL | Contrib Hub | The URL to an online Dataset location, held by the Custodian (may contain multiple files). | [Ashmore_Reef_Marine_Park_Bathymetry_2021_64m_MSL_OV](https://...) |
12- Platform Tier | Data Supplier | Used to define the Primary and subsequent Platform Tiers. For a Bathymetry Survey the 'Primary" platform may be a Ship, but the Ship may also have 'Secondary Platforms' like an AUV or an ROV. | Primary Platform, Secondary Platform |
13- Number of sensor heads for the survey | Data Supplier | Number of sensor heads used for the survey | One, two or part of survey used one head and another part used two heads (to mapped the shore line) |
14- Sensor number of beams | Data Supplier | Number of beams for the sensor | Reson 7101 (101, 239 or 511 beams) |
15- Sensor Transducer degree | Data Supplier | Along track beamwidth | (0.5 degree) |
16- Sensor Receiver degree | Data Supplier | Across track beamwidth | (1 degree) |
17- Sensor acquisition mode | Data Supplier | Which mode the bathymetry was acquired | Normal mode, single sector mode for (EM2040) or High resolution mode for (Teledyne Reson SeaBat) |
Preferred Name | Source | Definition | Example |
1- Operator | Data Supplier | The organisation that manages and operates the Platform used to perform the Survey | Schmidt Ocean Institute (SOI) |
2- DOI | Data Supplier / Contrib Hub | The DOI or Digital object identifier provide a persistent interoperable identifier for the Survey, Dataset or Publication | |
3- Collaborators | Data Supplier | One or more collaborating organisations and parties | Organisation A, Organisation B |
4- Sea Areas | Data Supplier & Contrib Hub | Ocean, Sea, Water Body names. Note: Make additional rows for each unique entry | Southern Ocean |
5- Sea Country Name | Data Supplier & Contrib Hub | Sea country doesn't just refer to a geographical area. It includes all living things, beliefs, values, creation stories, spirits and cultural obligations associated with it. The boundaries of different sea country areas are often clearly defined by features like river mouths | Yuin |
6- Survey Line Length (km) | Data Supplier / Contrib Hub | The total line kilometres traversed by the Survey, this will include Transit periods and detailed data collection areas | 151.5 |
7- Survey Area (square km) | Data Supplier / Contrib Hub | The total area in square kilometres covered by the Survey, this will include Transit periods and detailed data collection areas | 30052 (km2) |
8- Survey Depth Descriptor | Data Supplier / Contrib Hub | Simple binary descriptor for depth as Shallow (200m or less) or Deep (greater than 200m), based on 80% or more of the survey area. 200m is where the photic zone ends and marks the 5m resolution boundary. | Shallow, Deep |
9- Restriction Date | Data Supplier | A date field used to constrain the release date of a Survey or a specific data types. | 26-AUG-2030 2PM (2020-08-26T14:00:00Z) |
10- Restriction Contact Details | Data Supplier | The point of contact for removing or refining the restricted date. (Name and email) | |
11- Restriction Conditions | Data Supplier | Specific conditions describing the purpose and implementation of the restrictions | Metadata and contacts can be discoverable but the Data cannot be made available in any form until ... or data Not to be used for navigational purposes |
12- Sensor Serial No | Data Supplier / Contrib Hub | The Serial number of the Sensor, can often be extracted from the operating parameters | 547/548 |
13- Sensor Installation Date | Data Supplier | The data on which the specific Sensor (identified by the Serial No) was installed on the Platform | 2002-12-14T09:00:00Z |
14- Sensor Source URL | Data Supplier / Contrib Hub | The URL to an online repository for Sensor information, usually the commercial owner. |
Pass Requirements
Depending on the metadata received with the dataset:
A pass will require all the required metadata.
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With the exception of the Commonwealth Coat of Arms and where otherwise noted, this product is provided under a Creative Commons Attribution 4.0 International Licence.