Partition of the world ocean into 54 biogeochemical provinces based on prevailing regional oceanographic conditions and primary-production regimes, following Alan Longhurst's Ecological Geography of the Sea (Longhurst Provinces v4, 2010). The provinces are the standard reference framework for ocean biogeochemistry and pelagic biogeography.
public-high-seaslonghurst/Flanders Marine Institute (2009). Longhurst Provinces. Available online at https://www.marineregions.org/. Consulted on 2026-04-17.
Underlying science: Longhurst, A.R. (2007). Ecological Geography of the Sea, 2nd ed. Academic Press.
The PMTiles source-layer is provinces (the last segment of the dataset name) — not the shapefile name.
H3 hex grid (resolution 8, parents 7/6/0), Hive-partitioned by h0: