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Metadata: Plankton Imager (Pi-10) Meta data collected on RV Cefas Endeavour
Abstract:
Plankton Imager (Pi-10) data collected during RV Cefas Endeavour surveys. Data are images, separated by ten minute bins, and may be either unzipped, or zipped as tar files for that ten minute bin (zipping is a setting that can be turned on/off by the plankton imager acquisition software). Each image is directly named with the instrument ID, datetime and GPS data are embedded in the file metadata EXIF as decimal latitude longitude. These data provide an overview of where, when and how many images were captured by the plankton imager. Each row represents a 10-minute bin of images. The raw image data are stored on azure. The ‘BLOB’ column in the data indicates which folder within the azure container the data are stored. The HITS column indicates the number of images within that ten-minute bin and the MISSES column indicates the number of images not stored (e.g. due to date rate). The MISSES are needed to resolve abundance data in much the same way as splitting a physical plankton sample. Note, older data on an earlier prototype are available on request. The deployment of the Pi-10 is continuous and these data are updated every 3 months.
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 37140 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Plankton Imager (Pi-10) Meta data collected on RV Cefas Endeavour |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | CEFASf06381c1-8e7b-48ec-9295-389922b1f58e |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS22068 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2023-09-28 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2025-11-01 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Plankton Imager (Pi-10) data collected during RV Cefas Endeavour surveys. Data are images, separated by ten minute bins, and may be either unzipped, or zipped as tar files for that ten minute bin (zipping is a setting that can be turned on/off by the plankton imager acquisition software). Each image is directly named with the instrument ID, datetime and GPS data are embedded in the file metadata EXIF as decimal latitude longitude. These data provide an overview of where, when and how many images were captured by the plankton imager. Each row represents a 10-minute bin of images. The raw image data are stored on azure. The ‘BLOB’ column in the data indicates which folder within the azure container the data are stored. The HITS column indicates the number of images within that ten-minute bin and the MISSES column indicates the number of images not stored (e.g. due to date rate). The MISSES are needed to resolve abundance data in much the same way as splitting a physical plankton sample. Note, older data on an earlier prototype are available on request. The deployment of the Pi-10 is continuous and these data are updated every 3 months. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | The Plankton Imager is a high-speed, colour line-scan camera system that continuously samples mesozooplankton by pumping seawater through a flow-through chamber and imaging every passing particle in real-time (see: `https://doi.org/10.1101/2025.01.27.635045`_ for a detailed method). These blobs hold raw survey data uploaded directly from terabyte-scale physical hard drives following vessel-based surveys. Uploads are typically performed via Azure Data Box or equivalent secure bulk transfer mechanisms. These images may be classified manually or using machine learning. This data resource is for the raw image data only. For examples of classifiers see the rapid-plankton gui (`https://github.com/CefasRepRes/rapid-plankton`_ which demonstrates the real-time edge-ai classification of Pi-10 images as well as cloud-based classification. Data enquiries may be made available on request for the entirety of the data or per blob. Preservation of the original collected data structure is intentional at this stage. Data are uploaded without modification. No classification, filtering, or relabelling is performed. Integrity is maintained through Azure Blob Storage checksums and controlled write access. These containers represent the authoritative source data. All downstream processing, labelling, and machine learning workflows trace provenance back to these raw uploads. Quality StatementData quality reflects instrument performance and survey conditions at the time of collection. No post-collection quality filtering has been applied. Users must assess suitability for derived use. Bubbles frequently pollute the raw images. .. _`https://doi.org/10.1101/2025.01.27.635045`: https://doi.org/10.1101/2025.01.27.635045 .. _`https://github.com/cefasrepres/rapid-plankton`: https://github.com/CefasRepRes/rapid-plankton |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Plankton |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Orthoimagery | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Unknown | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | data.gov.uk | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 52.4595 |
| East | The eastern-most limit of the data resource in decimal degrees | 1.74086 |
| South | The southern-most limit of the data resource in decimal degrees | 52.4581 |
| West | The western-most limit of the data resource in decimal degrees | 1.73881 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Department for Environment, Food and Rural Affairs (DEFRA) | |
| defra.helpline@defra.gov.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| data.manager@cefas.co.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/22068 |
| Locator name | Name of the web resource | Cefas Data Portal |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | noLimitations | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ | |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2024-11-19 |
| Date of last revision | The most recent date that the resource was revised. | 2026-04-24 |
| Date of creation | The date that the resource was created. | 2024-11-04 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-25 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-04-24 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.1 |