FullBasin (MERIT Hydro, 90 m)

📂 Get MERIT Hydro first This record holds only layers derived from MERIT Hydro. Its flow directions and upstream pixel count (upg) are used together with these layers and are not redistributed here: global-hydrodynamics.github.io/MERIT_Hydro (Yamazaki et al., 2019). Every raster here is on the same 3″ grid, so a MERIT Hydro tile lines up with these layers pixel for pixel. 🌎 A guide to this dataset: fullhydro.org Find which files and which MERIT Hydro tiles you need, and look up any basin. FullBasin is an independent product derived from MERIT Hydro (Yamazaki et al., 2019); it is not an official MERIT Hydro product, and responsibility for it rests with the authors. FullBasin covers every land pixel of MERIT Hydro (22.26 billion pixels at 3″, about 90 m). For each pixel it gives three things: the outlet the pixel drains to; an index that returns the pixel's whole upstream catchment as one range of numbers (in the FullTopo record); 16 attributes of that catchment, where the catchment is at least 10 km². There are 24,587,290 outlets, of which 340,991 drain basins of 1 km² or more. Version 1.1, released with the revised manuscript; README.md gives the details. Licence. Every layer is under CC BY-NC 4.0 or ODbL 1.0, at your choice, as MERIT Hydro and MERIT DEM are; use ODbL 1.0 for commercial use. This replaces the CC BY 4.0 of v1.0. Files FileContents fulldivide_basins.zipthe outlet of every land pixel (raster), the basin attribute table (one row per outlet), and the outlines of the basins of 1 km² or more, simplified to 1/200° for display fulldivide_basins-by-region.zipfor each region: its rows of the basin attribute table, and the outlines of its basins of 1 km² or more along the 90 m pixel edges fulldivide_regions.zipthe 90 regions: raster, table, outlines fulldivide_basin-groups.zipbasin groups at HydroBASINS Levels 1 to 3 region_XXXXXX.zip (×90)for one region: the 16 attribute layers fullmorph_statistics.csvminimum, percentiles, maximum and mean of each attribute README.md, SHA256SUMS.txtdescription of every file and layer; checksums The upstream index seq_dfs is in its own record, FullTopo (MERIT Hydro, 90 m) v1.1. The upstream catchment of a pixel p, p included, is every pixel q of the same region with seq_dfs(p) − upg(p) + 1 ≤ seq_dfs(q) ≤ seq_dfs(p). Changes since v1.0 Regions. 90 regions, now made automatically. Upstream index. One number per pixel (seq_dfs) instead of dfs_in and dfs_out. Do not mix the numbers of the two versions. Georeferencing. Exact pixel size of 1/1200°. Elevation and averaging. Elevation from MERIT DEM v1.0.3; means and standard deviations weighted by pixel area. Plan-form measures. A refined perimeter; length, width and hull on great circles; the lemniscate ratio corrected. Unchanged. The delineation: every outlet keeps its ID, area and bounding box. Code. The data were computed with FlowDivide, FlowTopo and FlowMorph, version 1.1 (MIT licence): github.com/hellolulujiang. Paper. Jiang et al., Earth Syst. Sci. Data Discuss., doi:10.5194/essd-2026-402. How to cite. Please cite this record by its version DOI, and the paper. Please also cite the two source datasets: MERIT Hydro (Yamazaki et al., 2019, doi:10.1029/2019WR024873) and MERIT DEM (Yamazaki et al., 2017, doi:10.1002/2017GL072874), and HydroBASINS (Lehner and Grill, 2013, doi:10.1002/hyp.9740), whose Levels 1 to 3 define the basin groups.