Providing per-vessel speed data as a output variable
under review
M
Matthew Carr
Thank you for all the work on these tools, they are extremely useful and the fact that they are freely avaidable is greatly appericated!
This may overlap with previous requests which I have upvoted, but it would be extremely useful for the 4wings API request to return vessel speed as a returned field.
Having vessel speed as a field along with the currently avaidable date, flag, geartype, hours, lat, lon, and vesselIDs would allow for detailed studies of vessel activity and underwater radiated noise (URN).
The speed filter option implies that the underlying AIS data has speed avaidable, however it is only returned as a field from the events API. This means that vessels not involved in events are excluded.
Meaning that studies of vessel activity and underwater radiated noise (URN) would not be possible.
It is possible to use the 4wings API with the speed filter, and combine seperate request but this is bulky and ineffecient.
Thank you again for the tools avaidable!
G
Gisela Morinigo
updated the status to
under review
Thanks Matthew for your feedback, we will analyze how feasible this is based on the volume of the data. Also to get more context and increase the priority, can you please share more details of your use case? How are you envisioning using the data and who are the partners/stakeholders that you are working with. You can send this information via email if you prefer to apis@globalfishingwatch.org. Thanks!!
M
Matthew Carr
Hi Gisela Morinigo
Thank you for your response and interest in our request.
I'm currently working with Jock Currie in the Marine Programme at the South Africa National Biodiversity Institute (SANBI), which is a government research institute mandated to assess and report on the state of biodiversity at a national scale. One of SANBI's main body's of work, for example, is the National Biodiversity Assessment (https://nba.sanbi.org.za/), where more detail on some of the below can be found.
We are exploring the use of GFW for a variety of marine activity layers. Effectively trying to map the activity at sea for fishing and shipping sectors. Those activity maps will then be used in two avenues:
a) Ecosystem assessment: Activity maps for fishery (and shipping) sectors across South Africa's marine environment are used to construct cumulative pressure maps and subsequent ecological condition used in ecosystem threat assessments.
b) Spatial prioritisation and planning: Activity maps will serve as 'cost layers' in spatial prioritisation workflows, such as those used to identify Critical Biodiversity Areas, to reduce spatial overlap and associated burdens on existing industries.
This request relates to vessel-associated underwater radiated noise layer, which is a collaboration with colleagues in the Glonoise project (https://www.imo.org/en/ourwork/partnershipsprojects/pages/glonoise-partnership.aspx).
We are aiming to combine vessel presence from AIS (4wings API) with information from the vessel registry (vessel API) to create a map of vessel traffic based on engine/vessel size. We would like to extend this analysis to model underwater radiated noise (URN), which would require the vessel speed at each AIS detection as speed is an important parameter of URN. We are planning to use the URN Toolkit (https://glonoise.blueoasis.pt/) to model the propagation of the vessel-associated engine noise.
From what I understand the speed is included in the AIS data and is part of the GFW database (as it can be used in the 4wings API as a filter) but is not available as a returned field. Having speed as an accessible field through the API would allows us and future users to model URN from GFW data. We are hoping to make our scripted workflow freely available, which would enable others to recreate similar analyses in other areas.
Thank you again for making these tools freely available and being responsive to our user request!