{
  "schemaVersion": 1,
  "dataset": "GPCC Precipitation Analysis Climatology Version 2025 at 0.25°, reference period 1991–2020",
  "publisher": "Global Precipitation Climatology Centre (GPCC) at Deutscher Wetterdienst (DWD)",
  "sourceUrl": "https://opendata.dwd.de/climate_environment/GPCC/html/gpcc_precipitation_analysis_climatology_v2025_doi_download.html",
  "downloadUrl": "https://opendata.dwd.de/climate_environment/GPCC/GPCC_Precipitation_Analysis_Climatology/Version_2025/gpcc_precipitation_analysis_climatology_1991_2020_v2025_025.nc.gz",
  "doi": "https://doi.org/10.5676/DWD_GPCC/CLIMAT_V2025_025",
  "period": "1991-01-01/2020-12-31",
  "originalResolution": "0.25° regular latitude/longitude grid",
  "inputSha256": "3bd80d05df52572f6409b594ae26b43e9045147cb3c25254cddb5a934c16e5c5",
  "inputMd5": "d701c717e08ce6ad457c9f4004984d65",
  "license": "CC BY 4.0",
  "licenseUrl": "https://www.dwd.de/EN/service/legal_notice/legal_notice.html",
  "licenseEvidence": {
    "publisherProductLinksToLegalNotice": true,
    "officialIndexedLegalNoticeStatesCcBy40": true,
    "officialIndexedQuote": "Re-use is permitted solely under the terms of the Creative Commons license BY 4.0 (CC BY 4.0) providing the source is duly acknowledged.",
    "checkedAt": "2026-10-02",
    "directLegalNoticeStatus": 403,
    "dataCiteDoi": "10.5676/dwd_gpcc/climat_v2025_025",
    "dataCiteRightsList": [],
    "note": "DataCite confirms the exact publisher and product URL but supplies no registered rights. The license evidence is the official DWD indexed legal-notice text linked by the product page, not a DataCite rights claim. No access bypass used."
  },
  "attribution": "Rustemeier, Elke; Finger, Peter; Schirmeister, Zora; Ziese, Markus (2025): GPCC Precipitation Analysis Climatology Version 2025 at 0.25°. DOI: 10.5676/DWD_GPCC/CLIMAT_V2025_025. GPCC/DWD, CC BY 4.0. Modified: 12-month annual sum, target-country display masking, native-grid linear 250 mm contours and matching colour bands projected to Web Mercator. Original nearest native annual values retained for separate point lookup.",
  "bounds": [
    -25,
    32,
    65,
    73
  ],
  "width": 1800,
  "height": 1502,
  "projection": "EPSG:3857",
  "unit": "mm/year",
  "breaks": [
    250,
    500,
    750,
    1000,
    1250,
    1500,
    1750,
    2000,
    2250,
    2500,
    2750,
    3000
  ],
  "colors": [
    "#e6f2fa",
    "#b7d9ea",
    "#9fcddd",
    "#84c3db",
    "#66b0d1",
    "#4e9bc4",
    "#397fb1",
    "#2f6da4",
    "#275d96",
    "#1e4e86",
    "#183e70",
    "#12325e",
    "#0c274d"
  ],
  "numericLookup": {
    "path": "../precipitation-v1/values.bin.gz",
    "sha256": "84b2d7e502b3e529e57f6e3e3331ec7980518d144ed7574ee49d4ffc3f9875cc",
    "method": "Unchanged nearest native annual source-cell lookup; it is distinct from interpolated contour display."
  },
  "monthlyWindow": {
    "path": "data-source/atlas/europe/precipitation/isohyets-monthly-window.bin.gz",
    "sha256": "97967364ff2ab42e8c4cad727e67f0c9219c626636ae58020eb80e6a085c521b",
    "bytes": 1209283
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  "files": {
    "native-window.json": {
      "sha256": "e2fc53c435839665e85d7a790bfc31347b5fefa55e636edafaf981749c899c0c",
      "bytes": 7756
    },
    "native-annual.bin.gz": {
      "sha256": "50149482683533b704ae6f3b860063949b15028c1a683d8606896da3d94c010a",
      "bytes": 122215
    },
    "source-mask.png": {
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      "bytes": 28314
    },
    "precipitation.svg": {
      "sha256": "63948e3ddcbc5f0d0fffa9be1eaf1e416fa377e34dbaecfa638be8af34689628",
      "bytes": 533985
    },
    "geometry.json.gz": {
      "sha256": "244bf01b80295eb243fcd43ace5980831cb69754f8bf333568df4e6763cdfa83",
      "bytes": 219135
    },
    "precipitation.png": {
      "sha256": "c677a602ca61daa2506be4545750c8e133a519bad6b40a3ef888e78cfd104270",
      "bytes": 388820
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  },
  "processing": {
    "algorithm": "ContourPy serial, Linear, corner_mask=False, quad_as_tri=False",
    "version": "1.3.3",
    "reference": "https://contourpy.readthedocs.io/en/stable/user_guide/calculate/z_interp.html",
    "annualSum": "12 finite nonnegative native monthly normals required; float64 sum and a single float32 storage cast.",
    "contours": "250 mm intervals between fully valid source centres, with exactly the same geometry boundaries for adjacent colour bands.",
    "missing": "No source value changed or filled. Quads touching missing annual nodes remain unpainted; original country/source-missing mask also clips lines and bands.",
    "smoothing": "No spline smoothing, resampling to invent observations, national averages, or extrapolation.",
    "sourceMutation": false,
    "displayDoesNotIncreaseSourceResolution": true
  },
  "validation": {
    "validNativeNodes": 38941,
    "verifiedLineVertices": 8621,
    "verifiedSharedBandEdges": 8258,
    "maximumVertexRainfallErrorMm": 3.26281224261038e-11
  },
  "limitations": [
    "Contour display interpolates between 0.25 degree grid centres; it does not show measured station isohyets or fine valley rainfall.",
    "The numeric point lookup retains the nearest original annual grid value and may differ from the interpolated colour at that point.",
    "Where four valid annual corners are not available, the contour display is unpainted even when the nearest original grid value is available.",
    "A 0.25° source grid cannot resolve local rainfall within small countries or individual mountain valleys; the 1800×1502 rendering does not increase source resolution.",
    "Annual precipitation is not river discharge, groundwater recharge, available water supply or freshwater availability.",
    "Different source cells have different station support. Rain-gauge interpolation and the source baseline are retained; no uncertainty interval is invented.",
    "Ocean cells, source missing values, incomplete 12-month cells and land outside the 45-country display mask are transparent/missing; zero precipitation is distinct.",
    "Country display geometry only clips the map. No national average, area-weighted statistic, water volume or country-specific quantity is calculated.",
    "The longitude 65° east display limit clips the Russian Federation; this map does not represent all of Russia."
  ],
  "rendering": {
    "engine": "Retained sharp SVG renderer",
    "version": "0.35.4",
    "paintedPixels": 1091047,
    "partialPixels": 31128,
    "oldValidPixels": 1091163,
    "sourceMissingPixelsFilled": 0,
    "note": "Contours and adjacent bands retain the verified geometry. The palette changed; the source values and no-data mask did not."
  }
}