{ "schemaVersion": 1, "retrievedAt": "2026-10-02", "dataset": "BasinATLAS version 1.0, level 04, global source sub-basins contributing to the 45-country display frame", "publisher": "HydroATLAS / Linke et al.", "creators": [ "Bernhard Lehner", "Simon Linke", "Michele Thieme" ], "edition": "1.0", "publicationYear": 2019, "sourceUrl": "https://www.hydrosheds.org/hydroatlas", "doi": "https://doi.org/10.6084/m9.figshare.9890531.v1", "scientificReference": "Linke et al. (2019), Global hydro-environmental sub-basin and river reach characteristics at high spatial resolution, Scientific Data 6:283, https://doi.org/10.1038/s41597-019-0300-6", "downloadUrl": "https://ndownloader.figshare.com/files/20087237", "archiveFilename": "BasinATLAS_Data_v10_shp.zip", "archiveBytes": 4276492333, "wholeArchiveRetrieved": false, "wholeArchiveMd5Verified": false, "sourceCRS": "Geographic WGS84 (GCS_WGS_1984)", "originalDerivationResolution": "15 arc-seconds, approximately 500 m at the equator; not the rendered pixel resolution", "sourceMethod": "Level-04 Pfafstetter sub-basin delineation derived from the HydroSHEDS terrain and drainage model. Publication year 2019 identifies the product release, not a 2019 observation of river boundaries or water quantities.", "sourceRegion": "Global: no HydroSHEDS continental-region digit is excluded", "sourceRegionFeatures": 131, "sourceGlobalFeatures": 1342, "sourceSelection": "All 1342 global level-04 source polygons are rasterized; only units with at least one original-polygon pixel centre inside the existing 45-country/frame display mask are published in the identifier package.", "license": "CC BY 4.0", "licenseUrl": "https://creativecommons.org/licenses/by/4.0/", "technicalDocumentUrl": "https://data.hydrosheds.org/file/technical-documentation/HydroATLAS_TechDoc_v10_1.pdf", "attribution": "BasinATLAS v1.0 / HydroATLAS, Bernhard Lehner; Simon Linke; Michele Thieme. Scientific reference: Linke et al. (2019). CC BY 4.0. Sub-basin delineation derives from HydroSHEDS/WWF (Lehner et al. 2008; Lehner and Grill 2013). Modified: Global level-04 polygons selected by target-country/frame pixel-centre coverage, Web Mercator cartographic rasterization and categorical colors.", "disclaimer": "HydroATLAS data are provided as is, without warranty; the authors disclaim suitability, accuracy, uninterrupted use and liability as described in technical documentation sections 4.2-4.3 and CC BY 4.0 section 5.", "attributeScope": "Only HYBAS_ID, PFAF_ID, NEXT_DOWN and MAIN_BAS identifiers are published. The 281 hydro-environmental attributes are excluded. The collective database is CC BY 4.0; individual environmental columns can be CC BY 4.0 or ODbL and must be checked before any future use. Original-format underpinning source licenses are not changed.", "bounds": [ -25, 32, 65, 73 ], "width": 1800, "height": 1502, "projection": "EPSG:3857", "frame": { "width": 1200, "height": 1001, "west": -25, "south": 32, "east": 65, "north": 73 }, "lookup": { "width": 1800, "height": 1502, "encoding": "little-endian float32 row-major gzip", "nodata": -1, "gridType": "display", "valueMeaning": "Exact integer 1..131 indexes basins.json; -1 is missing/outside the 45-country display mask. 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"displayPixelCenters": 3051 }, { "index": 104, "color": "#c4a9cb", "displayPixelCenters": 230 }, { "index": 105, "color": "#a6c69c", "displayPixelCenters": 3834 }, { "index": 106, "color": "#a6c69c", "displayPixelCenters": 10029 }, { "index": 107, "color": "#86b6cf", "displayPixelCenters": 354 }, { "index": 108, "color": "#e2bb80", "displayPixelCenters": 7635 }, { "index": 109, "color": "#c4a9cb", "displayPixelCenters": 1584 }, { "index": 110, "color": "#a6c69c", "displayPixelCenters": 5134 }, { "index": 111, "color": "#86b6cf", "displayPixelCenters": 9048 }, { "index": 112, "color": "#e2bb80", "displayPixelCenters": 31 }, { "index": 113, "color": "#c4a9cb", "displayPixelCenters": 2855 }, { "index": 114, "color": "#c4a9cb", "displayPixelCenters": 7538 }, { "index": 115, "color": "#a6c69c", "displayPixelCenters": 4149 }, { "index": 116, "color": "#86b6cf", "displayPixelCenters": 1519 }, { "index": 117, "color": "#c4a9cb", "displayPixelCenters": 3369 }, { "index": 118, "color": "#86b6cf", "displayPixelCenters": 15330 }, { "index": 119, "color": "#c4a9cb", "displayPixelCenters": 2759 }, { "index": 120, "color": "#c4a9cb", "displayPixelCenters": 3143 }, { "index": 121, "color": "#86b6cf", "displayPixelCenters": 12739 }, { "index": 122, "color": "#a6c69c", "displayPixelCenters": 10818 }, { "index": 123, "color": "#e2bb80", "displayPixelCenters": 389 }, { "index": 124, "color": "#c4a9cb", "displayPixelCenters": 42 }, { "index": 125, "color": "#d69e95", "displayPixelCenters": 6133 }, { "index": 126, "color": "#86b6cf", "displayPixelCenters": 118 }, { "index": 127, "color": "#e2bb80", "displayPixelCenters": 20405 }, { "index": 128, "color": "#86b6cf", "displayPixelCenters": 343 }, { "index": 129, "color": "#a6c69c", "displayPixelCenters": 3422 }, { "index": 130, "color": "#86b6cf", "displayPixelCenters": 28835 }, { "index": 131, "color": "#e2bb80", "displayPixelCenters": 292 } ], "processing": { "displayMask": "Original BasinATLAS polygon pixel-centre containment, intersected with the existing 45 target-country outlines; all polygon holes preserved.", "imageAndPickingUseSameMask": true, "originalGeometrySimplified": false, "boundaryDilation": false, "gapFilling": false, "quantityDerived": false, "rawSourceIncludedInRepository": false, "sourceMutation": false, "displayResolutionIsSourceResolution": false, "colors": "Categorical adjacency colors; nearby four-neighbor display units have different colors. Color has no quantitative order and can repeat in separated units.", "adjacencyEdges": 292 }, "limitations": [ "Level-04 sub-basin units are not the complete catchments of every named river; some coastal units combine several small catchments.", "Publication year 2019 is a product release date, not a common observation year; boundaries derive from a terrain/drainage model.", "HydroSHEDS delineation quality is lower north of 60 degrees latitude because a coarser HYDRO1k elevation source replaces SRTM there.", "The map does not display river discharge, groundwater quantity, precipitation, available water supply or any area-derived water quantity.", "Small countries or narrow/coastal areas may have no display pixel centres or source coverage. Gaps stay missing; no polygon is invented.", "The map clips original sub-basin units to the 45-country display extent, and longitude 65 degrees east clips Russia." ], "validation": { "validDisplayPixels": 1066516, "visibleBasinUnits": 131, "unresolvedDisplayCountries": [ "VAT", "MCO" ], "allMissingDisplayCountries": [] }, "countryCoverage": [ { "code": "RUS", "displayPixelCenters": 541169, "validDisplayPixelCenters": 535917, "missingDisplayPixelCenters": 5252 }, { "code": "NOR", "displayPixelCenters": 58861, "validDisplayPixelCenters": 51911, "missingDisplayPixelCenters": 6950 }, { "code": "FRA", "displayPixelCenters": 38264, "validDisplayPixelCenters": 37202, "missingDisplayPixelCenters": 1062 }, { "code": "SWE", "displayPixelCenters": 70692, "validDisplayPixelCenters": 69901, "missingDisplayPixelCenters": 791 }, { "code": "BLR", "displayPixelCenters": 19056, "validDisplayPixelCenters": 19056, "missingDisplayPixelCenters": 0 }, { "code": "UKR", "displayPixelCenters": 43217, "validDisplayPixelCenters": 43051, "missingDisplayPixelCenters": 166 }, { "code": "POL", "displayPixelCenters": 26607, "validDisplayPixelCenters": 26339, "missingDisplayPixelCenters": 268 }, { "code": "AUT", "displayPixelCenters": 6029, "validDisplayPixelCenters": 6029, "missingDisplayPixelCenters": 0 }, { "code": "HUN", "displayPixelCenters": 6467, "validDisplayPixelCenters": 6467, "missingDisplayPixelCenters": 0 }, { "code": "MDA", "displayPixelCenters": 2257, "validDisplayPixelCenters": 2257, "missingDisplayPixelCenters": 0 }, { "code": "ROU", "displayPixelCenters": 15870, "validDisplayPixelCenters": 15867, "missingDisplayPixelCenters": 3 }, { "code": "LTU", "displayPixelCenters": 6339, "validDisplayPixelCenters": 6332, "missingDisplayPixelCenters": 7 }, { "code": "LVA", "displayPixelCenters": 6883, "validDisplayPixelCenters": 6781, "missingDisplayPixelCenters": 102 }, { "code": "EST", "displayPixelCenters": 5301, "validDisplayPixelCenters": 5141, "missingDisplayPixelCenters": 160 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