Open n-a-t-e opened 2 years ago
Maybe Metadata TT clarify which of the source databases they would like to see - The maritime boundaries list is just a list of countries of the world, but there are many other sources available on the marine regions website:
The new CIOOS Metadata profile supports adding Marine Regions for datasets. There could be a drop down in the spatial tab to select a region, the list populated via an API or shortened list.