The basin mask assigns every land pixel of North America — the HydroSHEDS v2.0 extent, which holds the Arctic drainage as well (HydroBASINS units 7 and 8) — to the outlet it drains to. There are 30,077,037 outlets, numbered by the area they drain, largest first. The region masks divide the continent into regions, each computed at once, at capacities of 160, 80 and 40 square degrees (106, 196 and 371 regions). The tables list the 105,581 basins of at least 1 km² and every group, region and piece; the map draws the 27,618 basins of at least 10 km², simplified.
The basin mask assigns every land pixel of South America to the outlet it drains to. There are 7,383,055 outlets, numbered by the area they drain, largest first. The region masks divide the continent into regions, each computed at once, at capacities of 160, 80 and 40 square degrees (59, 99 and 209 regions). The tables list the 38,510 basins of at least 1 km² and every group, region and piece; the map draws the 11,005 basins of at least 10 km², simplified.
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