{
  "total": 2,
  "source": "d1",
  "tracking_since": "2026-10-25T12:38:37.716Z",
  "source_rechecks": {
    "rows": 785,
    "series": 682,
    "last_checked_at": "2026-10-27T01:29:39.000Z",
    "latest_result_counts": {
      "confirmed": 644,
      "unreachable": 19,
      "needs_review": 5,
      "changed": 2,
      "not_found_on_page": 8,
      "partial": 4
    },
    "method": "Each source URL is fetched and the recorded numbers are looked for in the page (PDFs via pdftotext); anything not confirmed is reviewed by a human. Log: /downloads/price_rechecks.jsonl"
  },
  "observations": [
    {
      "id": "po_20261025_74ac6380ae9e",
      "series_key": "ps_5e04014890199689",
      "kind": "benchmark",
      "use_case_id": "mine-site-drone-survey",
      "use_case_ids": [
        "mine-site-drone-survey"
      ],
      "provider_id": null,
      "description": "Drone photogrammetric 3D model of a quarry face (200–500 linear metres) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 1000,
      "high": 2500,
      "currency": "EUR",
      "unit": "per face",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/quarry-face-inspection-drone-photogrammetry-safety-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T20:26:06.955Z",
      "content_hash": "sha256:74ac6380ae9eed79f715b8d9d022d576fd16cb398fa05ea34a490fade113db8d",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 1119,
        "high": 2797,
        "fx": {
          "pair": "EUR/USD",
          "rate": 1.11881,
          "eur_per_usd": 0.89381,
          "rate_date": "2026-10-26",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-26, not at the price's as_of date. Indicative only."
      }
    },
    {
      "id": "po_20261025_ec06a2c15ccb",
      "series_key": "ps_cb6f746515218c73",
      "kind": "benchmark",
      "use_case_id": "mine-site-drone-survey",
      "use_case_ids": [
        "mine-site-drone-survey"
      ],
      "provider_id": null,
      "description": "Annual drone survey campaign on a quarry (flight, control points, volumetrics note) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 1200,
      "high": 3000,
      "currency": "EUR",
      "unit": "per campaign",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/quarry-3d-model-annual-production-declaration-drone-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T20:26:06.955Z",
      "content_hash": "sha256:ec06a2c15ccb9f41121e1e7cd02b55ea7fbd7de63e93e1f32e7c3542916f202a",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 1343,
        "high": 3356,
        "fx": {
          "pair": "EUR/USD",
          "rate": 1.11881,
          "eur_per_usd": 0.89381,
          "rate_date": "2026-10-26",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-26, not at the price's as_of date. Indicative only."
      }
    }
  ],
  "series": [
    {
      "series_key": "ps_5e04014890199689",
      "kind": "benchmark",
      "use_case_id": "mine-site-drone-survey",
      "provider_id": null,
      "description": "Drone photogrammetric 3D model of a quarry face (200–500 linear metres) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per face",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/quarry-face-inspection-drone-photogrammetry-safety-price/",
      "observations": 1,
      "first_observed_at": "2026-10-25T20:26:06.955Z",
      "last_observed_at": "2026-10-25T20:26:06.955Z",
      "current": true,
      "latest": {
        "low": 1000,
        "high": 2500,
        "as_of": "2026-09-22",
        "id": "po_20261025_74ac6380ae9e"
      },
      "trend": null,
      "last_rechecked": {
        "checked_at": "2026-10-27T01:26:25.942Z",
        "result": "confirmed",
        "by": "automatic"
      }
    },
    {
      "series_key": "ps_cb6f746515218c73",
      "kind": "benchmark",
      "use_case_id": "mine-site-drone-survey",
      "provider_id": null,
      "description": "Annual drone survey campaign on a quarry (flight, control points, volumetrics note) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per campaign",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/quarry-3d-model-annual-production-declaration-drone-price/",
      "observations": 1,
      "first_observed_at": "2026-10-25T20:26:06.955Z",
      "last_observed_at": "2026-10-25T20:26:06.955Z",
      "current": true,
      "latest": {
        "low": 1200,
        "high": 3000,
        "as_of": "2026-09-22",
        "id": "po_20261025_ec06a2c15ccb"
      },
      "trend": null,
      "last_rechecked": {
        "checked_at": "2026-10-27T01:26:25.942Z",
        "result": "confirmed",
        "by": "automatic"
      }
    }
  ],
  "note": "Only one observation per series so far: we started recording every price on 2026-10-25 and re-check every source on a schedule. A trend appears when a re-checked source shows a different price (we never overwrite old observations).",
  "pagination": {
    "total": 2,
    "limit": 200,
    "offset": 0,
    "returned": 2,
    "next_offset": null,
    "next": null,
    "prev": null
  },
  "license": "Whirrwork (https://whirrwork.com), CC BY 4.0"
}