bg mean slope derived

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      "latitude": 42.6977,
      "longitude": 23.3219
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    "type": "http",
    "method": "POST",
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  "output": {
    "type": "json",
    "example": {
      "facts": {
        "measurements": {
          "mean-slope": {
            "name": "Mean slope",
            "unit": "degree",
            "value": 1,
            "method": "documented source raster sample",
            "metric": "mean-slope",
            "sample_count": 1
          }
        }
      },
      "result": "measurement_available",
      "status": "success",
      "caveats": [
        "Preliminary geodata assessment; not a legally binding property, cadastral, planning, environmental or title search.",
        "Raster resolution and model uncertainty can be larger than the submitted site geometry.",
        "Material decisions require a current verification by the competent national or regional authority."
      ],
      "charged": true,
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      "service": "bg-mean-slope",
      "sources": [
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          "name": "Copernicus DEM GLO-30 Full, Free & Open",
          "caveats": [
            "Digital surface model: vegetation and structures can raise the measured surface above bare earth.",
            "Values over water and source voids may be unavailable."
          ],
          "dataset": "Copernicus DEM GLO-30 Full, Free & Open",
          "license": "COP-DEM-GLO-30-F Full, Free & Open licence",
          "purpose": "Surface elevation and deterministic terrain derivatives.",
          "version": "COP-DEM-GLO-30-F",
          "coverage": "Global land surface; requests are restricted to the 30 published European countries.",
          "provider": "European Union Copernicus Programme / ESA / DLR / Airbus",
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          "data_date": "2015-12-31T23:59:59.000Z",
          "freshness": "Pinned COP-DEM-GLO-30-F product.",
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          "resolution": "30 metres",
          "source_url": "https://copernicus-dem-30m.s3.eu-central-1.amazonaws.com/",
          "attribution": "© DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved.",
          "data_period": "TanDEM-X acquisition period 2011-2015; this is not a current-condition survey.",
          "cache_policy": "HTTP byte ranges only; bounded 2 GB derived block cache, no whole-dataset copy.",
          "retrieved_at": "2026-09-03T00:00:00.000Z",
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          "license_verified_at": "2026-09-03",
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      ],
      "summary": "Bulgaria: Mean slope: source-backed screening evidence was calculated successfully.",
      "category": "country",
      "evidence": {
        "mean-slope": {
          "name": "Mean slope",
          "unit": "degree",
          "value": 1,
          "method": "documented source raster sample",
          "metric": "mean-slope",
          "sample_count": 1
        }
      },
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      "data_date": "2015-12-31T23:59:59.000Z",
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      "confidence": 0.85,
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        "Material decisions require a current verification by the competent national or regional authority."
      ],
      "generated_at": "2026-09-03T00:00:00.000Z",
      "confidence_method": "Conservative minimum source-family baseline plus a bounded sample-count bonus; multi-source results receive a fixed integration penalty.",
      "authoritative_status": "preliminary_non_binding",
      "recommended_next_steps": [
        "Verify material findings with current cadastral, planning and environmental records from the competent authority.",
        "Commission a qualified on-site survey where parcel-scale conditions affect the decision."
      ],
      "evidence_classification": "derived_from_open_geodata"
    }
  }
}