{
  "certificateVersion": "2026.11-V2",
  "sku": "AW-TJ-025",
  "slug": "indian",
  "name": "Indian — Turnagain Arm & Indian Valley",
  "category": "Coastal / Alpine (Mixed)",
  "gnisId": "1403794",
  "gnisUrl": "https://edits.nationalmap.gov/apps/gaz-domestic/public/search/names/1403794",
  "coordinates": {
    "latitude": 60.9858,
    "longitude": -149.5189
  },
  "boundingBox": [
    -149.84,
    60.83,
    -149.18,
    61.15
  ],
  "horizontalCrs": "EPSG:3338 (NAD83 / Alaska Albers Equal Area Conic)",
  "verticalDatum": "MLLW (<0m marine soundings) / NAVD88 (>0m terrestrial elevation)",
  "maxElevationM": 1528.9,
  "maxDepthM": -22,
  "chartId": "NOAA Chart 16660 (Turnagain Arm)",
  "verifiedFeatures": [
    "INDIAN",
    "BIRD PEAK",
    "INDIANHOUSE MTN",
    "TURNAGAIN ARM",
    "INDIAN CREEK PASS",
    "BIRD POINT",
    "INDIAN CREEK",
    "BIRD CREEK",
    "RAINBOW PEAK",
    "MCHUGH PEAK",
    "CHUGACH RANGE"
  ],
  "sources": [
    {
      "provider": "USGS 3D Elevation Program (3DEP)",
      "dataset_name": "USGS 3DEP Alaska 5-Meter IfSAR Digital Elevation Model (3DEPElevation ImageServer)",
      "dataset_id": "USGS-3DEP-IFSAR-5M-AW-TJ-025",
      "acquisition_method": "IfSAR (Interferometric Synthetic Aperture Radar — standard Alaska 5m 3DEP DEM)",
      "resolution": "5m native IfSAR DEM resampled to Float32 grid (1400x1400)",
      "horizontal_crs": "EPSG:3338 (NAD83 / Alaska Albers Equal Area Conic)",
      "vertical_datum": "NAVD88 (North American Vertical Datum of 1988, meters)"
    },
    {
      "provider": "NOAA National Centers for Environmental Information (NCEI) & Office of Coast Survey",
      "dataset_name": "NOAA NCEI DEM_global_mosaic & NOAA Chart 16660 (Turnagain Arm)",
      "dataset_id": "NOAA-NCEI-COOK-INLET-DEM-16660",
      "acquisition_method": "Compiled bathymetric DEM & NOAA hydrographic chart soundings",
      "resolution": "1/3 arc-second (~10m) regional coastal DEM mosaic",
      "horizontal_crs": "EPSG:4326 projected to EPSG:3338 (NAD83 / Alaska Albers)",
      "vertical_datum": "MLLW (chart soundings) / tidal coastal mosaic (VDatum NAVD88-to-MLLW separation pending formal review)"
    }
  ],
  "contactSheetUrl": "/products/AW-TJ-025/qa/contact-sheet-8panel.webp",
  "verifiedAt": "2026-11-09T17:00:00Z"
}