{
 "slug": "bierstadt-merced-river-1866",
 "object": {
  "title": "Merced River, Yosemite Valley",
  "accession": "09.214.1",
  "date": "1866",
  "holder": "The Metropolitan Museum of Art",
  "is_public_domain": true
 },
 "window": {
  "start": "1863-08-01",
  "end": "1863-08-31",
  "days": 31,
  "basis": "Analyst-selected calendar month around the documented August journey and reported 21 August camp inscription; not continuous valley residence or a depicted-day window."
 },
 "station": {
  "name": "CAMP UNION",
  "id": "047630",
  "observer": "Joseph H. Wythe",
  "lat": 38.53778,
  "lon": -121.50389,
  "elevation": "25'",
  "scope": "Regional: lowland Sacramento, not Yosemite Valley",
  "km_to_picture": null,
  "distance_reason": "depicted_viewpoint_not_established",
  "rain_observation_hour": null,
  "hour_reason": "PRCP-99_observation_hour_unspecified"
 },
 "rainfall": {
  "inches": 0.0,
  "readings": 31,
  "days": 31,
  "aggregation": "Sum of unflagged PRCP-99 cells for station 047630, calendar August 1863 only",
  "zero_days": 31,
  "limit": "Digitized QC record; MRCC may fill daily blanks with zeros when reconciled to an observer monthly total. Original forms not inspected. No local rain or cloud inference."
 },
 "temperature": {
  "mean_f": 71.21505376344086,
  "readings": 93,
  "aggregation": "Arithmetic mean of unflagged 07/14/21 h Fahrenheit readings at Camp Union; not daily high/low means; research data only"
 },
 "same_station_august_comparisons": [
  {
   "year": 1863,
   "days": 31,
   "rain_readings": 31,
   "rain_in": 0.0,
   "rain_reason": null,
   "temperature_readings": 93,
   "fixed_hour_mean_f": 71.21505376344086,
   "temperature_reason": null
  },
  {
   "year": 1864,
   "days": 31,
   "rain_readings": 31,
   "rain_in": 0.1,
   "rain_reason": null,
   "temperature_readings": 92,
   "fixed_hour_mean_f": null,
   "temperature_reason": "missing_or_flagged_reading"
  },
  {
   "year": 1865,
   "days": 31,
   "rain_readings": 31,
   "rain_in": 0.0,
   "rain_reason": null,
   "temperature_readings": 93,
   "fixed_hour_mean_f": 70.20430107526882,
   "temperature_reason": null
  }
 ],
 "comparison_limit": "Three same-camp Augusts only; observer changes after September 1863; no climate rank or modern normal.",
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  }
 ],
 "rejected": [
  {
   "name": "Sacramento, Thomas Logan",
   "station_id": "047633",
   "source_key": "sacramento",
   "calendar_rows": 31,
   "populated_measurement_cells": 0,
   "rain_in": null,
   "reason": "all_observation_cells_blank"
  },
  {
   "name": "Fort Miller",
   "station_id": "043261",
   "source_key": "fort-miller",
   "calendar_rows": 31,
   "populated_measurement_cells": 0,
   "rain_in": null,
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  }
 ],
 "witnesses": {
  "month": {
   "text": "In August of 1863",
   "source_key": "catalogue-text",
   "source": "Text extraction of the Met catalogue, p. 327",
   "locator": "pdftotext -layout; page image inspected",
   "url": "https://libmma.contentdm.oclc.org/digital/api/collection/p15324coll10/id/40860/download"
  },
  "dissent": {
   "text": "not the correct title for the work",
   "source_key": "title-dissent-text",
   "source": "Text extraction of the Met catalogue, p. 328",
   "locator": "pdftotext -layout; page image inspected",
   "url": "https://libmma.contentdm.oclc.org/digital/api/collection/p15324coll10/id/40861/download"
  },
  "season": {
   "text": "In California at this season the dome of heaven is cloudless",
   "source_key": "ludlow",
   "source": "Fitz-Hugh Ludlow, Seven Weeks in the Great Yo-Semite (June 1864)",
   "locator": "Atlantic Monthly 13, pp. 739–754; first view of Tu-toch-anula",
   "url": "https://www.theatlantic.com/magazine/archive/1864/06/seven-weeks-in-the-great-yo-semite/628596/"
  },
  "camp": {
   "text": "Camped here August 21, 1863. A. Bierstadt, Virgil Williams, E. W. Perry, Fitzhugh Ludlow.",
   "source_key": "hutchings",
   "source": "James M. Hutchings, In the Heart of the Sierras (1888)",
   "locator": "Chapter XXV, Register Rock; later transcription of the reported inscription",
   "url": "https://www.yosemite.ca.us/library/in_the_heart_of_the_sierras/25.html"
  },
  "clouds": {
   "text": "fantastic peaks rise sheer from the water into the clouds",
   "source_key": "clouds",
   "source": "Bryson Burroughs, Catalogue of Paintings (Met, fifth edition, 1920)",
   "locator": "p. 16, B473-2; OCR checked against page scan",
   "url": "https://archive.org/download/cu31924020595173/cu31924020595173_djvu.txt"
  }
 },
 "unresolved": {
  "painted_day": null,
  "painted_day_reason": "studio_picture_no_documented_depicted_day",
  "depicted_viewpoint": null,
  "viewpoint_reason": "published_title_dissent_unresolved",
  "source_sketch": null,
  "source_sketch_reason": "no_securely_matched_sketch_in_hand",
  "valley_rain_in": null,
  "valley_cloud_cover": null,
  "valley_river_flow": null,
  "local_weather_reason": "no_verified_local_record_in_hand",
  "changed_clouds": null,
  "changed_clouds_reason": "no_documented_before_and_after_comparison"
 },
 "receipts": {
  "object": {
   "title": "The Metropolitan Museum of Art, object 10150, accession 09.214.1",
   "url": "https://collectionapi.metmuseum.org/public/collection/v1/objects/10150",
   "sha256": "2b2a0cc6e195adbea1627022b4163128d7dd302566d8873bd6516c8393e3fb0c",
   "retrieved_at": "2026-10-07",
   "license": "The Met Open Access; API marks image Public Domain",
   "locator": "Object identity and public-domain image status"
  },
  "catalogue": {
   "title": "Spassky et al., American Paintings in The Metropolitan Museum of Art, vol. II (1985)",
   "url": "https://libmma.contentdm.oclc.org/digital/api/collection/p15324coll10/id/40860/download",
   "sha256": "a7e3df9d1e40d6ba161ac6fd2121ed1ef97fb3f986e083bb0c1a4e33b1dd95a9",
   "retrieved_at": "2026-10-07",
   "license": "Copyright The Metropolitan Museum of Art; museum-provided free individual-page download for reading; short quotations only",
   "locator": "p. 327: studio execution, August 1863 journey and composition"
  },
  "catalogue-text": {
   "title": "Text extraction of the Met catalogue, p. 327",
   "url": "https://libmma.contentdm.oclc.org/digital/api/collection/p15324coll10/id/40860/download",
   "sha256": "64ccec19d04d2ff7eb025e784a9fb9e5b3e2afb1a46e44176d32fdb0fa141a14",
   "retrieved_at": "2026-10-07",
   "license": "Copyright The Metropolitan Museum of Art; museum-provided free individual-page download for reading; short quotations only",
   "locator": "pdftotext -layout; page image inspected"
  },
  "title-dissent": {
   "title": "The Met catalogue (1985), continuation of Merced River entry",
   "url": "https://libmma.contentdm.oclc.org/digital/api/collection/p15324coll10/id/40861/download",
   "sha256": "60e2957226bde16570b8d94191f2f706a0f436ce3b637b5a43e8254225d039a3",
   "retrieved_at": "2026-10-07",
   "license": "Copyright The Metropolitan Museum of Art; museum-provided free individual-page download for reading; short quotations only",
   "locator": "p. 328: inscription and report of Hendricks (1974), CL-171"
  },
  "title-dissent-text": {
   "title": "Text extraction of the Met catalogue, p. 328",
   "url": "https://libmma.contentdm.oclc.org/digital/api/collection/p15324coll10/id/40861/download",
   "sha256": "2f3f9ca402ab22f10612ead8e80ab0ee753c177b0a49589ed86dd4eea488763e",
   "retrieved_at": "2026-10-07",
   "license": "Copyright The Metropolitan Museum of Art; museum-provided free individual-page download for reading; short quotations only",
   "locator": "pdftotext -layout; page image inspected"
  },
  "ludlow": {
   "title": "Fitz-Hugh Ludlow, Seven Weeks in the Great Yo-Semite (June 1864)",
   "url": "https://www.theatlantic.com/magazine/archive/1864/06/seven-weeks-in-the-great-yo-semite/628596/",
   "sha256": "08d3372d83b8637f1579e432522d5366d4c6ed8e602bde6e540c491493e692da",
   "retrieved_at": "2026-10-07",
   "license": "Public-domain historical text; archive/publisher delivery metadata may have separate rights",
   "locator": "Atlantic Monthly 13, pp. 739–754; first view of Tu-toch-anula"
  },
  "hutchings": {
   "title": "James M. Hutchings, In the Heart of the Sierras (1888)",
   "url": "https://www.yosemite.ca.us/library/in_the_heart_of_the_sierras/25.html",
   "sha256": "333f360f4795cef032c1b42f192b88e77602fa389a448489762396518a837f7b",
   "retrieved_at": "2026-10-07",
   "license": "Public-domain historical text; archive/publisher delivery metadata may have separate rights",
   "locator": "Chapter XXV, Register Rock; later transcription of the reported inscription"
  },
  "clouds": {
   "title": "Bryson Burroughs, Catalogue of Paintings (Met, fifth edition, 1920)",
   "url": "https://archive.org/download/cu31924020595173/cu31924020595173_djvu.txt",
   "sha256": "b7f534b3e4d6bfec97528704d81ab7daa25ea2147888d095b1bc8ceed30e8194",
   "retrieved_at": "2026-10-07",
   "license": "Public-domain historical text; archive/publisher delivery metadata may have separate rights",
   "locator": "p. 16, B473-2; OCR checked against page scan"
  },
  "sacramento": {
   "title": "Camp Union daily register, NOAA/CDMP, digitized and checked by MRCC",
   "url": "https://mrcc.purdue.edu/files/FORTS/Data/DAILYBYSTATE/CA_Sacramento.data.csv",
   "sha256": "12669bb9a4aa4827ff4120ef483064a2e3a16422c53755864d0df53a792406a6",
   "retrieved_at": "2026-10-07",
   "license": "NOAA/CDMP historical federal observations; credit MRCC",
   "locator": "Select station 047630; calendar August, 1863–1865; other Sacramento IDs kept separate"
  },
  "station": {
   "title": "MRCC, Sacramento station histories and variable definitions",
   "url": "https://mrcc.purdue.edu/files/FORTS/Data/DAILYBYSTATE/CA_Sacramento.metadata.csv",
   "sha256": "a89ecbd347e01ef6cdf4f80ced21330578139e1a21768f60ad6f43a0429fe7c4",
   "retrieved_at": "2026-10-07",
   "license": "NOAA/CDMP historical federal observations; credit MRCC",
   "locator": "Camp Union January–September 1863; observer Joseph H. Wythe"
  },
  "fort-miller": {
   "title": "Fort Miller daily register, NOAA/CDMP and MRCC",
   "url": "https://mrcc.purdue.edu/files/FORTS/Data/DAILYBYSTATE/CA_Fort_Miller.data.csv",
   "sha256": "f7563db0a65a288f35eb1f658223dda53c477bf45616a9a31f74af353bd5f46b",
   "retrieved_at": "2026-10-07",
   "license": "NOAA/CDMP historical federal observations; credit MRCC",
   "locator": "Station 043261; August 1863 calendar rows have no observations"
  },
  "image": {
   "title": "Albert Bierstadt, Merced River, Yosemite Valley (1866)",
   "url": "https://images.metmuseum.org/CRDImages/ad/original/DT2961.jpg",
   "sha256": "9ba270ec64d18edceb7207dc1a2c30923da4974f739d3ef0d7765ad71d5e2409",
   "retrieved_at": "2026-10-07",
   "license": "The Met Open Access; API marks image Public Domain",
   "locator": "Met 09.214.1; Open Access image DT2961"
  },
  "qc": {
   "title": "MRCC, Quality Control of 19th Century Weather Data",
   "url": "https://mrcc.purdue.edu/FORTS/qc1",
   "sha256": "aae1add75d47b265ae31ea649d8ebaa4144f9cf973407f2f8f34d777ccf46f19",
   "retrieved_at": "2026-10-07",
   "license": "MRCC methodology; research cache, short paraphrase",
   "locator": "Precipitation checks: filling remaining daily cells with zero after monthly reconciliation"
  },
  "clouds-scan": {
   "title": "The Met Catalogue of Paintings (1920), page scan",
   "url": "https://archive.org/download/cu31924020595173/page/n41.jpg",
   "sha256": "b1dcb4e51ba0400c8131fd39f4e849901b2387a66389210f01a8a37aaf2a2f79",
   "retrieved_at": "2026-10-07",
   "license": "Public domain historical catalogue",
   "locator": "Printed p. 16, entry B473-2"
  }
 }
}