{
  "title": "Landing orbital globe: photographic cloud density and observed night lights",
  "prepared": "2026-10-27",
  "registration": {
    "projection": "Equirectangular / geographic longitude-latitude",
    "boundsDegrees": [
      -180,
      -90,
      180,
      90
    ],
    "north": "top",
    "west": "left",
    "horizontalWrap": true,
    "uv": "u = (longitude + 180) / 360; v = (latitude + 90) / 180 with Three.js TextureLoader default flipY",
    "transform": "No crop, rotation or geographic shift. Registration matches the existing NASA Blue Marble surface."
  },
  "sources": [
    {
      "name": "NASA Black Marble 2016 grayscale global map",
      "page": "https://science.nasa.gov/earth/earth-observatory/earth-at-night/maps/",
      "processingBackground": "https://science.nasa.gov/earth/earth-observatory/night-light-maps-open-up-new-applications-90008/",
      "sourceUrl": "https://assets.science.nasa.gov/content/dam/science/esd/eo/images/imagerecords/144000/144897/BlackMarble_2016_3km_gray.jpg",
      "credit": "NASA Earth Observatory image by Joshua Stevens, using Suomi NPP VIIRS data from Miguel Roman, NASA Goddard Space Flight Center.",
      "dateRepresented": "2016 composite; not live lighting",
      "sourceDimensions": [
        13500,
        6750
      ],
      "sourceBytes": 3064569,
      "sourceSha256": "3fbc8aae3529dc1ebfcf3aa9361bd3dfc11d19950a6af6d8ed2df61bd8b0134d",
      "processing": "The NASA grayscale product isolates observed night lights against black. Lanczos downsampled to 4096x2048 and 2048x1024. Encoded as progressive grayscale JPEG quality 94. No invented lights, contrast boost, or land/background color added. Shader supplies a restrained warm tint and gates emission by sunlight.",
      "outputs": [
        "earth-night.jpg",
        "earth-night-mobile.jpg"
      ]
    },
    {
      "name": "NASA Blue Marble cloud composite",
      "page": "https://visibleearth.nasa.gov/images/57747/blue-marble-clouds/77558l",
      "sourceUrl": "https://eoimages.gsfc.nasa.gov/images/imagerecords/57000/57747/cloud_combined_8192.tif",
      "credit": "NASA Blue Marble cloud composite by Reto Stockli, with enhancements by Robert Simmon, NASA Goddard Space Flight Center.",
      "dateRepresented": "2002 composite; not current weather",
      "sourceDimensions": [
        8192,
        4096
      ],
      "sourceBytes": 35870468,
      "sourceSha256": "d137775d8966ab8d443fd5126dc6e7ad72072bc1ed50555c5818d221735daf0f",
      "processing": "Source green channel retained as a grayscale density map (matches the alphaMap channel of the existing cloud texture). Desktop preserves original 8192x4096 sampling; mobile is Lanczos downsampled to 4096x2048. Progressive grayscale JPEG quality 90. No sharpening, synthetic weather, or geographic warp.",
      "outputs": [
        "cloud-detail.jpg",
        "cloud-detail-mobile.jpg"
      ]
    }
  ],
  "rights": {
    "status": "NASA imagery generally available for informational use, subject to NASA media guidance; no NASA endorsement implied.",
    "guidance": "https://www.nasa.gov/nasa-brand-center/images-and-media/"
  },
  "assets": [
    {
      "path": "/media/platform/earth-night.jpg",
      "width": 4096,
      "height": 2048,
      "mode": "L",
      "jpegQuality": 94,
      "bytes": 419249,
      "sha256": "766ef49936dd246f0f937b4d437c9e2620b566369650183e9cd57fd2ab45211d"
    },
    {
      "path": "/media/platform/earth-night-mobile.jpg",
      "width": 2048,
      "height": 1024,
      "mode": "L",
      "jpegQuality": 94,
      "bytes": 120120,
      "sha256": "64ca91938b7aeb3e441ede49d9cf11a63df06fb1c205938bea899ff02361bd1a"
    },
    {
      "path": "/media/platform/cloud-detail.jpg",
      "width": 8192,
      "height": 4096,
      "mode": "L",
      "jpegQuality": 90,
      "bytes": 8669718,
      "sha256": "a10799f591ef3fd1e8fe9de4b7d6086ff398a85cc46e64c69c2bec808b90ba32"
    },
    {
      "path": "/media/platform/cloud-detail-mobile.jpg",
      "width": 4096,
      "height": 2048,
      "mode": "L",
      "jpegQuality": 90,
      "bytes": 2543034,
      "sha256": "3954ad24430b4cbb3c237d1958358c18deb4947082124d8cd3569b0feb97f277"
    }
  ]
}