{
  "schema": 1,
  "retrieved_at": "2026-10-02",
  "scope": "Wall Street Observatory: accepted USGS airborne positions, derived sections and USDA NAIP overhead reference. No locator database, new acquisition or ground scan.",
  "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."
    }
  ],
  "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.",
    "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."
  ]
}