README.txt
FlowDivide v1.1 · MERIT Hydro 90 m ================================== Released 2026-09-20, files rebuilt 2026-09-28 Code FullHydro C code v9.91 (FlowDivide) What changed Region mask at capacity 1400 square degrees: 90 regions (v1.0 had 96). A region is a whole HydroBASINS Level-02 unit where it fits; units 35, 56, 77 and 91 are divided. New: basin groups at HydroBASINS Level-01, Level-02 and Level-03. Basins unchanged: same 24,587,290 outlets, same ids and pixel counts; bsn_*, bnd_* and the basin table are the v1.0 files. Files (size, SHA-256) rgn_global_90m.tif 262 MB 462ebdfdd9f8c79a4e8683e76bc6b78ed69bb48abb062bffa3dd0303dc102827 rat_global_90m.csv 17 kB 1575e767143cafb91d100c78f52afc44be849959e0ad5ef225864b6d57b27d80 rat_global_90m_with_tiles.csv 31 kB 7e3e0f3078cfd7b9745ca37d3d156a8f8295a20b303107570013f919f44be0e5 rgn_global.parquet 5.0 MB 14b1c14cd69f193b5e76b08faf86b33430d3726635e29b5aacd8e494d0f4b040 gat_global_90m_l1.csv 5.4 kB 5c0630ca48d161eea0ea98078e01abdfe5f26faea20e8979e0e415e9bb7ff075 gat_global_90m_l2.csv 14 kB a1cffbb171ed6508eec905f4b15975bbf9a0eeceab54a6302067dace3580852e gat_global_90m_l3.csv 48 kB 33aa65ab811a3af69d6c9a909744717b80bb3d0779f9d89a3a2772ad6c2f6b6e bat_global_90m_gt1km2_groups.csv 6.9 MB 5f56bfc0cfb22a8053d1355d2ab14952e0016362d87c104af91393cf441cd564 grp_global_l1.parquet 3.7 MB d75e09f48e1830f84caac88f475a44c93baf767fe4705a578dbe86dd9868c210 grp_global_l2.parquet 4.9 MB f47817ec1e2160c2892b0842888b7782aa60b551381146d82b75769d439fc7c7 grp_global_l3.parquet 6.6 MB 41d784e7c5eecad073ff9fa7b9f19fbaf9557a3120a42cbe4e5139eb5a13de4b bsn_global_90m.tif 263 MB c63d03477149e4a0382c237024eafb2fa26b029b636994921d00cb8d4961314d bat_global_90m_gt1km2.csv 63 MB 6b94bb13328bb70b9dfd93fb4c8905cce0d50bd225d39cbd9b655c80785a3e0d bsn_global_gt1km2.gpkg 146 MB 2652e987505cbc32d7a790523de5bd6dd557765b3a634597bc6907fba8bef6a0 bnd_global_gt1km2.gpkg 142 MB 342b2cc1d11e4a14c4d71545a77f1797aa63a6b1bd47e6f153a7cca3ae1a586b Each file is at https://data.fullhydro.org/<this folder>/<path above>.
| Name | Size | Updated | Description |
|---|---|---|---|
| ../ | up one level | ||
| README.txt | 2.6 kB | what this folder holds | |
| rgn_global_90m.tif | 262 MB | 2026-09-28 | the global region mask: the region id of each pixel |
| rat_global_90m.csv | 17 kB | 2026-09-28 | region attribute table, one row per region |
| rat_global_90m_with_tiles.csv | 31 kB | 2026-09-28 | the same regions with the MERIT Hydro tile list of each |
| rgn_global.parquet | 5.0 MB | 2026-09-26 | region outlines, GeoParquet, simplified, with color_id |
| gat_global_90m_l1.csv | 5.4 kB | 2026-09-28 | basin group table, HydroBASINS Level-01 units, 34 rows |
| gat_global_90m_l2.csv | 14 kB | 2026-09-28 | basin group table, Level-02 units, 86 rows |
| gat_global_90m_l3.csv | 48 kB | 2026-09-28 | basin group table, Level-03 units, 316 rows |
| bat_global_90m_gt1km2_groups.csv | 6.9 MB | 2026-09-28 | the group of each basin at all three levels, 340,991 rows, joined on basin_id |
| grp_global_l1.parquet | 3.7 MB | 2026-09-26 | Level-01 group outlines, GeoParquet, simplified, with color_id |
| grp_global_l2.parquet | 4.9 MB | 2026-09-26 | Level-02 group outlines |
| grp_global_l3.parquet | 6.6 MB | 2026-09-26 | Level-03 group outlines |
| bsn_global_90m.tif | 263 MB | 2026-08-31 | the global basin mask: every land pixel carries the id of the outlet it drains to, all 24,587,290 outlets · UInt32, nodata 0 · Cloud-Optimized GeoTIFF · the v1.0 file, unchanged |
| bat_global_90m_gt1km2.csv | 63 MB | 2026-08-31 | basin table cut to the 340,991 basins of at least 1 km², 27 columns (the full table is on Zenodo) · the v1.0 file, unchanged |
| bsn_global_gt1km2.gpkg | 146 MB | 2026-09-12 | 340,955 simplified basin polygons (enclosed basins show as holes) · the v1.0 file, unchanged |
| bnd_global_gt1km2.gpkg | 142 MB | 2026-09-12 | the outer boundaries of the same basins, as lines · the v1.0 file, unchanged |
The same folder on the data server: https://data.fullhydro.org/merit-hydro-90m/flowdivide/v1.1/