{
  "total": 2,
  "source": "d1",
  "tracking_since": "2026-10-25T12:38:37.716Z",
  "source_rechecks": {
    "rows": 1116,
    "series": 752,
    "last_checked_at": "2026-10-27T05:31:56.000Z",
    "latest_result_counts": {
      "confirmed": 706,
      "changed": 5,
      "unreachable": 21,
      "needs_review": 2,
      "partial": 7,
      "not_found_on_page": 11
    },
    "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_5b5854dc0665",
      "series_key": "ps_689b83f36c6acaa9",
      "kind": "benchmark",
      "use_case_id": "rail-track-inspection",
      "use_case_ids": [
        "rail-track-inspection"
      ],
      "provider_id": null,
      "description": "Drone round of a plain-line railway catenary section (in segments, under possession) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 1800,
      "high": 4500,
      "currency": "EUR",
      "unit": "per flying day",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/railway-catenary-overhead-line-drone-inspection-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T20:26:06.955Z",
      "content_hash": "sha256:5b5854dc06650dd6488fd1b1f94a76141b10852782edebe58f835d30aa4e5c76",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 2014,
        "high": 5035,
        "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_6d8ef7bcf1be",
      "series_key": "ps_26d2bdc823465f7a",
      "kind": "benchmark",
      "use_case_id": "rail-track-inspection",
      "use_case_ids": [
        "rail-track-inspection"
      ],
      "provider_id": null,
      "description": "One-off drone inspection of a rail stretch (a few km, no traffic interruption) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 800,
      "high": 2000,
      "currency": "EUR",
      "unit": "per stretch",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/railway-track-infrastructure-inspection-drone-cost/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T20:26:06.955Z",
      "content_hash": "sha256:6d8ef7bcf1be9f414a42b3a9d3781b1fe6a97bfa3e324de0344b06cdd47aa86d",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 895,
        "high": 2238,
        "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_689b83f36c6acaa9",
      "kind": "benchmark",
      "use_case_id": "rail-track-inspection",
      "provider_id": null,
      "description": "Drone round of a plain-line railway catenary section (in segments, under possession) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per flying day",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/railway-catenary-overhead-line-drone-inspection-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": 1800,
        "high": 4500,
        "as_of": "2026-09-22",
        "id": "po_20261025_5b5854dc0665"
      },
      "trend": null,
      "last_rechecked": {
        "checked_at": "2026-10-27T01:26:25.942Z",
        "result": "confirmed",
        "by": "automatic"
      }
    },
    {
      "series_key": "ps_26d2bdc823465f7a",
      "kind": "benchmark",
      "use_case_id": "rail-track-inspection",
      "provider_id": null,
      "description": "One-off drone inspection of a rail stretch (a few km, no traffic interruption) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per stretch",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/railway-track-infrastructure-inspection-drone-cost/",
      "observations": 1,
      "first_observed_at": "2026-10-25T20:26:06.955Z",
      "last_observed_at": "2026-10-25T20:26:06.955Z",
      "current": true,
      "latest": {
        "low": 800,
        "high": 2000,
        "as_of": "2026-09-22",
        "id": "po_20261025_6d8ef7bcf1be"
      },
      "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"
}