{
  "schema": 1,
  "retrieved_at": "2026-10-02",
  "scope": "Independent source geometry, aerial color and primary-source educational interpretation for the BCC landmark collection. No Google imagery, signed-in account or field capture was used.",
  "sources": [
    {
      "id": "usgs-lidar",
      "url": "https://registry.opendata.aws/usgs-lidar/",
      "title": "USGS 3DEP LiDAR Point Clouds",
      "publisher": "USGS data; public Entwine organization maintained by Hobu",
      "date": "2018 acquisition; LAS published 2019",
      "retrieved_at": "2026-10-02",
      "license": "US Government Public Domain",
      "supports": "Lossless public EPT copy, independent measured returns, public-domain data rights. Only the anonymous usgs-lidar-public bucket was used; no requester-pays bucket."
    },
    {
      "id": "usgs-rights",
      "url": "https://www.usgs.gov/faqs/what-are-terms-uselicensing-map-services-and-data-national-map",
      "title": "Terms of Use/Licensing for The National Map",
      "publisher": "US Geological Survey",
      "date": null,
      "retrieved_at": "2026-10-02",
      "license": "Public-domain data; attribution requested",
      "supports": "USGS elevation reuse and originating-agency acknowledgment."
    },
    {
      "id": "usgs-native-crs",
      "url": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/USGS_LPC_UT_Southern_QL1_2018_LAS_2019/ept-sources/1800.json",
      "title": "Native LAS source metadata retained in the UT Southern QL1 EPT",
      "publisher": "USGS LAS metadata via public Entwine copy",
      "date": "2018 / 2019",
      "retrieved_at": "2026-10-02",
      "license": "US Government Public Domain",
      "supports": "Native compound WKT specifies NAD83(2011) / UTM 12N and NAVD88 height, Geoid12B. The EPT itself declares EPSG:3857. Elevation is retained without a vertical conversion. Native metadata groups 1700 and 1800 cover all 15 original LAS tile IDs in these crops; both groups were checked in evidence/source-coordinate-check.json."
    },
    {
      "id": "usgs-project-dates",
      "url": "https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/LPC/Projects/USGS_LPC_UT_Southern_QL1_2018_LAS_2019/metadata/USGS_LPC_UT_Southern_QL1_2018_12SUG9562_LAS_2019_meta.xml",
      "title": "USGS Lidar Point Cloud UT Southern QL1 2018 12SUG9562 LAS 2019 metadata",
      "publisher": "US Geological Survey",
      "date": "2019-06-03",
      "retrieved_at": "2026-10-02",
      "license": "No access restrictions; USGS disclaimer and change disclosure apply",
      "supports": "Project acquisition interval 2018-04-27 to 2018-07-29, publication date, source limitations. The generic XML horizontal reference is malformed (UTM zone 30); native LAS WKT and EPT metadata control coordinate interpretation instead."
    },
    {
      "id": "usda-naip",
      "url": "https://apps.geo.fpac.usda.gov/geo-imagery/rest/services/naip/conus_naip/ImageServer",
      "title": "USDA conterminous US NAIP imagery service",
      "publisher": "USDA FPAC / Farm Service Agency",
      "date": "2024 Utah acquisition, exact flight dates per crop",
      "retrieved_at": "2026-10-02",
      "license": "US Government Public Domain, NAIP dataset record",
      "supports": "Locked primary-raster RGB crops, image identities and acquisition dates. Per-model imagery.json retains exact requests, extents and hashes."
    },
    {
      "id": "naip-rights",
      "url": "https://catalog.data.gov/dataset/national-agriculture-imagery-program-naip-imagery",
      "title": "National Agriculture Imagery Program (NAIP) Imagery",
      "publisher": "US Department of Agriculture, data.gov catalog",
      "date": "2025-07-09",
      "retrieved_at": "2026-10-02",
      "license": "US Government Public Domain; record links the USA.gov public-domain label",
      "supports": "Dataset-specific rights, aerial acquisition and orthorectification. This does not grant rights to Utah Hexagon or Google licensed imagery, neither of which is used."
    },
    {
      "id": "utah-naip",
      "url": "https://gis.utah.gov/products/sgid/aerial-photography/naip/",
      "title": "National Agriculture Imagery Program (NAIP)",
      "publisher": "Utah Geospatial Resource Center",
      "date": "2024 data collection page",
      "retrieved_at": "2026-10-02",
      "license": "Reference only; no UGRC photograph copied",
      "supports": "Utah 2018-and-later NAIP is 0.6 m imagery with a stated horizontal accuracy of +/-4 m; source service and flight-date fields. Sampling a mesh more finely does not improve image resolution."
    },
    {
      "id": "nps-navajo",
      "url": "https://www.nps.gov/thingstodo/navajo-loop-trail.htm",
      "title": "Navajo Loop Trail",
      "publisher": "National Park Service",
      "date": null,
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; no page photograph reused",
      "supports": "Wall Street and Two Bridges are the two sides of Navajo Loop; narrow limestone walls and Douglas-fir context. No current trail status is asserted."
    },
    {
      "id": "nps-sunset",
      "url": "https://www.nps.gov/places/000/sunset-point.htm",
      "title": "Sunset Point",
      "publisher": "National Park Service",
      "date": "2026-08-15",
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied",
      "supports": "Sunset sector, Thor’s Hammer below the viewpoint, Silent City to the south, Claron color interpretation."
    },
    {
      "id": "nps-inspiration",
      "url": "https://www.nps.gov/places/000/inspiration-point-viewpoint.htm",
      "title": "Inspiration Point",
      "publisher": "National Park Service",
      "date": null,
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; no photograph copied",
      "supports": "Multiple rim overlooks; Silent City rows south of Sunset; nearby upper White and lower Pink Member context. No member contacts are mapped by this model."
    },
    {
      "id": "nps-bryce",
      "url": "https://www.nps.gov/places/000/bryce-point.htm",
      "title": "Bryce Point",
      "publisher": "National Park Service",
      "date": "2024-10-10",
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied",
      "supports": "Southern viewpoint looking north; Grottos and Wall of Windows context; hidden interiors not resolved by airborne topography."
    },
    {
      "id": "nps-fairyland",
      "url": "https://www.nps.gov/places/000/fairyland-point.htm",
      "title": "Fairyland Point",
      "publisher": "National Park Service",
      "date": "2024-10-10",
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied",
      "supports": "Northern viewpoint, Fairyland Canyon and neighboring Boat Mesa/Campbell Canyon; differing erosional history, without numeric age or rate."
    },
    {
      "id": "nps-rainbow",
      "url": "https://www.nps.gov/places/000/rainbow-point.htm",
      "title": "Rainbow Point",
      "publisher": "National Park Service",
      "date": "2026-08-15",
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied",
      "supports": "One of the highest viewpoints, northward view, undercut southern plateau cliffs; local crop does not show the entire distant view."
    },
    {
      "id": "nps-yovimpa",
      "url": "https://www.nps.gov/places/000/yovimpa-point.htm",
      "title": "Yovimpa Point",
      "publisher": "National Park Service",
      "date": "2024-10-10",
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied",
      "supports": "High southern overlook facing the Grand Staircase; paired exhibit studies its local ridge only."
    },
    {
      "id": "nps-agua",
      "url": "https://www.nps.gov/places/000/agua-canyon.htm",
      "title": "Agua Canyon",
      "publisher": "National Park Service",
      "date": null,
      "retrieved_at": "2026-10-02",
      "license": "Paraphrased facts and link only; photograph credited NPS / Peter Densmore is not copied",
      "supports": "Agua Canyon identity and prominent Hunter/Rabbit hoodoos; individual hidden surfaces remain unresolved."
    },
    {
      "id": "nps-tower",
      "url": "https://www.nps.gov/places/fairyland-and-tower-bridge-wayside.htm",
      "title": "Fairyland and Tower Bridge Wayside",
      "publisher": "National Park Service",
      "date": "2024-10-10",
      "retrieved_at": "2026-10-02",
      "license": "Reference only",
      "supports": "Tower Bridge candidate identity and relationship to Fairyland; no texture or window geometry extracted."
    },
    {
      "id": "nps-mossy",
      "url": "https://www.nps.gov/places/000/mossy-cave.htm",
      "title": "Mossy Cave",
      "publisher": "National Park Service",
      "date": "2024-10-10",
      "retrieved_at": "2026-10-02",
      "license": "Reference only",
      "supports": "Mossy Cave candidate identity; alcove and water details require different capture evidence."
    },
    {
      "id": "nps-bridge",
      "url": "https://www.nps.gov/places/000/natural-bridge.htm",
      "title": "Natural Bridge",
      "publisher": "National Park Service",
      "date": "2026-08-15",
      "retrieved_at": "2026-10-02",
      "license": "Reference only; existing reconstruction retains its original USGS photo record",
      "supports": "Existing landmark audit; a natural arch, not a stream-cut bridge."
    },
    {
      "id": "nps-queens",
      "url": "https://www.nps.gov/thingstodo/queen-s-garden-trail.htm",
      "title": "Queen’s Garden Trail",
      "publisher": "National Park Service",
      "date": "2026-08-15",
      "retrieved_at": "2026-10-02",
      "license": "Reference only",
      "supports": "Existing Queen’s Garden candidate identity; no new trail operational information."
    },
    {
      "id": "osm-locators",
      "url": "https://www.openstreetmap.org/copyright",
      "title": "OpenStreetMap data and copyright",
      "publisher": "OpenStreetMap contributors",
      "date": "API extracts retrieved 2026-10-02; frozen original locators retained",
      "retrieved_at": "2026-10-02",
      "license": "ODbL 1.0; attribution to OpenStreetMap contributors",
      "supports": "Independent named-point locators used to choose editorial study bounds. Extracts retained in evidence/sources; public locator records list exact node URLs. The measured mesh itself is exclusively USGS-derived."
    },
    {
      "id": "usgs-geonames",
      "url": "https://carto.nationalmap.gov/arcgis/rest/services/geonames/MapServer/5",
      "title": "The National Map Geographic Names — Landforms",
      "publisher": "US Geological Survey",
      "date": null,
      "retrieved_at": "2026-10-02",
      "license": "US Government Public Domain, National Map terms",
      "supports": "GNIS Silent City feature 1445586 at about -112.16854, 37.61999; the study bounds were corrected to include this published locator. Other named landform points provide a location check, not a surveyed feature boundary."
    }
  ],
  "credits": [
    "Map services and data available from U.S. Geological Survey, National Geospatial Program.",
    "Aerial imagery: USDA Farm Service Agency / FPAC, National Agriculture Imagery Program, 2024.",
    "Named locator positions: © OpenStreetMap contributors, ODbL 1.0.",
    "Three.js 0.186.1, MIT license retained at vendor/three/LICENSE. Gelasio and Inter, SIL OFL; existing local font licenses retained."
  ],
  "reuse_limits": [
    "NPS and other editorial photographs are linked for comparison, not reused as model textures.",
    "No USGS/NPS/USDA endorsement is implied.",
    "The delivered mesh is an educational derivative, not a survey, geologic map, navigation surface, or current condition report."
  ]
}