Based on HydroSHEDS v2 (Lehner et al., 2022), the 1 arc-second flow directions, about 30 m at the equator.
The basin mask and the region masks of FullBasin, computed on HydroSHEDS v2 at 30 m, one continent at a time. Every land pixel is assigned to the outlet it drains to; whole basins are gathered into basin groups along the HydroBASINS Level-02 and Level-03 units, and the continent is partitioned into regions that fit a workstation's memory, at three capacities, in which a basin too large for one region is cut into pieces at tributary outlets — and every later step works one region at a time. Tables carry the 30 m numbers; the maps draw the same masks, simplified. Licence CC BY 4.0.
The first layers of FullBasin at 30 m. The 90 m collection goes on to a per-pixel upstream index and sixteen upstream attributes; at 30 m those are not computed yet. What is here is the division of North America and South America into basins and regions, complete, with the tables that describe every basin of at least 1 km², every basin group and every region. HydroSHEDS v2 has released the Americas; the other continents follow when it does.
The basin mask: every land pixel assigned to the outlet it drains to, the outlets numbered by the area they drain, basin 1 the largest. Two groupings of the same basins into basin groups, along the HydroBASINS Level-02 and Level-03 units, and three region masks at capacities of 160, 80 and 40 square degrees. Map on the left, the released tables on the right, with their own columns. The continent is chosen on the page.
The per-pixel upstream index and the upstream attributes of the 90 m collection, not yet computed at 30 m.
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fullhydro.org