Frequently asked questions about interacting with OTN and our affiliated regional partners


How do I register with OTN?

If you wish to register your project with OTN you can email OTNDC@DAL.CA for assistance. We require 3 metadata types: 1) project metadata, 2) instrument deployment metadata and 3) tagging metadata. See the templates here https://members.oceantrack.org/data/data-collection and check this page for more information http://oceantrackingnetwork.org/join-otn

What is the benefit of registering with OTN or an affiliated Node?

OTN and affiliated networks provide automated cross-referencing of your detection data with other tags in the system to help resolve "mystery detections" and provide detection data to taggers in other regions. OTN's Data Managers will also extensively quality-control your submitted metadata for errors to ensure the most accurate records possible are stored in the database. OTN's database and Data Portal website are excellent places to archive your datasets for future use and sharing with collaborators. We offer pathways to publish your datasets with OBIS, and via open data portals like ERDDAP, GeoServer etc. The data-product format returned by OTN is directly ingestible by analysis packages such as glatos and resonATe for ease of analysis. OTN offers support for the use of these packages and tools.

What is an OTN database Node?

OTN has partnered with several regional acoustic telemetry networks around the world to enable detection-matching across our communities. An OTN Node is a copy of OTN's database structure which allows for direct cross-referencing between every one of these affiliated groups. You can see the list of OTN Nodes here: https://members.oceantrack.org. You only need to report your data to one Node in order for your tags/detections to matched to all Nodes.

Please contact OTNDC@DAL.CA if you are interested in connecting with your regional network and learning about their affiliation with OTN.

Why can I view/receive emails for projects that I don't remember joining?

When logged in to the Data Portal you should see a "My Projects" list on the left-hand menu. These are all the projects which you have been granted access to OR for which all data have been made public by the project PIs. If you are unsure why you can see a certain project please reach out to OTNDC@DAL.CA or your regional Node Manager.

If you are receiving Detection Extract notification emails for a certain project, it means you have been granted access to that project. It's possible that a colleague registered you as a project collaborator without your knowledge and therefore you have been added to the project folder. If you would like to stop receiving these emails please contact OTNDC@DAL.CA or your regional Node Manager.

What is the difference between your Data Portal and your Database?

OTN's Data Portal website (https://members.oceantrack.org) is similar to DropBox or another file repository service. While there are helpful links and tools to explore, this site is mainly used to hold private repository folders for each project. In your project folder, you can add files which can be viewed by anyone who has been given access. These folders are also where OTN will upload your Detection Extracts when they are ready. 

OTN's database is built on PostgreSQL/PostGIS and is hosted on OTN hardware at Dalhousie University. Many partner Nodes are hosted at other locations. Users do not have direct write access to the database: the files posted in your Data Portal folder will be downloaded, quality controlled and loaded into the database by a Data Manager.

What is a Data Push?

In order to create meaningful Detection Extracts, OTN and affiliated Nodes only perform cross-matching events every 3 months or so (when enough data has been processed). During this Data Push process our databases are backed up, the website is updated and detection matches are released to all relevant projects.

If you're expecting detection extracts but have not yet received them, it is likely that you project is queued for the next Data Push.

What is your Privacy Policy? Am I protected?

OTN's data policy can be found here https://members.oceantrack.org/data/policies. Generally, animal metadata about a tagged animal is protected by a default 2-year embargo (that begins after projected tag battery expiration) before any animal-specific metadata is made public. This means that receiver-operators will only receive species information for animals which have left embargo, and will receive tag-owner contact info for still-embargoed animals. If you would like to extend your embargo or request early publication please reach out to OTNDC@DAL.CA or your local Node Manager.

While there is general agreement about what data should be protected, other regional networks may have differing data policies. Reach out to your regional Node Manager to learn about yours.

How do I make my data public?

Automatically, all receiver location information and deployment metadata is made public on OTN's Geoserver and on your project's public-facing page (ex: https://members.oceantrack.org/project?ccode=HFX). If you would like to make your detections, Detection Extracts or animal/tagging metadata public ahead of their default embargo periods, please contact OTNDC@DAL.CA or your local Node Manager.

How do I apply for an equipment loan?

OTN offers animal telemetry equipment loans for partners around the world. Loans are evaluated for scientific merit and equipment distributed on a first-come-first-serve basis. See this link for the required paperwork: https://members.oceantrack.org/data/otn-equipment-loaner-program

Why do I have to complete an annual report for OTN and report metadata to OTN's data team?

If you are a recipient of an OTN equipment loan you will have to complete an annual report/survey for OTN's funders. This is required to update our funders on the general status of all OTN-owned equipment and includes a summary of work completed by your project, list of publications etc. However, this does NOT fulfil your data reporting obligation as per the OTN data policy, and so you still must supply the actual metadata and data files to OTN's data team in order to match and be matched to detections/animals in the Detection Extracts.

Detection Extracts

What are Detection Extract data products?

OTN and all of its partner Nodes create Detection Extracts on a semi-regular basis, approximately every 3 months, following a cross-Node coordinated detection matching event known as a Data Push. These Detection Extract files contain only the detections for the year corresponding to the suffix on the file name. See the detailed documentation here https://members.oceantrack.org/data/otn-detection-extract-documentation-matched-to-animals.

How often will you match my detections?

OTN and all of its partner Nodes create Detection Extracts on a semi-regular basis, approximately every 3 months, following a cross-Node coordinated detection matching event known as a Data Push.

My tags matched to projects in another region which seems impossible. What should I do?

Please note that we are now matching your tags to all OTN-compatible databases worldwide. This may result in biologically improbable matches across large spatial scales. If any detections we have matched to your animals should not be attributed to your animals, please let us know. There are OTN supported tools (Python: resonATe, R: glatos) which will assist with identifying false detections via filters such as the Pincock time-lag filter, distance, impossible velocities, etc. OTN can provide support to researchers learning to work with these tools. Reporting and un-matching detections that you find to be in error will help us one day match those detections to the correct researcher. Please advise your local Node Manager ASAP when you have determined a match to be incorrect.

What analysis tools can I use with my Detection Extracts?

There are OTN supported tools (Python: resonATe, R: glatos) which will assist with identifying false detections via filters such as the Pincock time-lag filter, distance, impossible velocities, etc. OTN can provide support to researchers learning to work with these tools. You can see more here https://members.oceantrack.org/data. OTN's previous workshop material can be viewed on the OTN YouTube, the OTN Github, and on our Acoustic Telemetry Toolbox Curriculum (in development). To arrange a workshop/walkthrough of the tools in use by OTN partners please contact OTNDC@DAL.CA.

Reporting Metadata/Data

I found a mistake in my receiver/tag metadata, what should I do?

Please report the mistake to OTNDC@DAL.CA or your regional Node Manager as soon as possible for correction. This is especially important for errors regarding station locations since these lat/longs are provided to taggers who have had animals detected at that location.

You often find mistakes in my metadata. What is your QA/QC process that finds these?

OTN has an extensive suite of tools for Node Managers called Nodebooks. These tools check for things such as:

Is each receiver deployed in exactly one place at one time? Are detections from when the receiver was actually in the water? Are tags deployed in no more than one animal at a time? Is the detection from after a tag was released and before the tag battery died? Do the tag serial number/ID code match the provided vendor specification or is there a typo?

OTN always performs a second verification check on the data after it has been loaded to ensure the Nodebooks functioned correctly and no error slipped through.

How does OTN correct for receiver timedrift?

OTN's Data Manager toolbox (the Nodebooks) corrects for timedrift between each initialization and offload of a receiver. If a receiver is offloaded several times in one data file, time correction does not occur linearly from start to end, but between each download, to ensure the most accurate correction. If there is only one download in a data file then the time correction in VUE software will match the time correction performed by OTN.

Why does OTN request my vendor specifications?

We use the vendor-provided specifications to check for typos in serial numbers, tag ID, tag code spaces and estimated tag lives that occur on manual data entry. Many of these errors can affect tag matching: if ID code, code space, or tag life are incorrect it may result in the inability to match those tags. Instead of sending tagging specifications every time you purchase new tags we recommend you complete the Vemco Authorization form here https://members.oceantrack.org/data/data-collection and return to your local Node Manager. Please reach out if you'd like an authorization form for another vendor.

Can I provide instrument data from any vendor?

Yes! OTN supports the matching of, and builds new tools to support, many vendors.

Can I provide non-acoustic data for archiving?

Yes! You can upload your non-acoustic satellite or environmental data to your Data Portal folder for safe-keeping. Additionally, all types of instrument metadata is supported in our metadata sheets, so you can track which acoustic receivers/tags were co-deployed with other sensors. This is important information to include in order to provide full project records. Reach out to your local Node Manager if you're interested in learning how to report non-acoustic metadata and data.

How do I report range test/sentinel tags?

Please report all range test and sentinel data - these are important to include in your project records in order to add valuable context to the dataset! Additionally, reporting your test tags will help resolve any "mystery detections" that may occur as a result of their deployment. These can be reported using the Instrument Deployment form here https://members.oceantrack.org/data/data-collection. Please contact OTNDC@DAL.CA or your regional Node Manager if you need assistance.

How do I report active tracking or mobile VMT detections?

Active tracking data requires a GPS track file along with your exported detection data in order to geolocate the detections. Please contact OTNDC@DAL.CA or your regional Node Manager if you need assistance.

How do I report glider-collected detections?

Glider-collected data required a GPS track file, the instrument detection file, and a Glider metadata form from here https://members.oceantrack.org/data/data-collection. Please contact OTNDC@DAL.CA or your regional Node Manager if you need assistance.