{
  "certificateVersion": "2026.11-V2",
  "sku": "AW-TJ-006",
  "slug": "anchorage",
  "name": "Anchorage — Chugach Front Range, Anchorage Bowl & Cook Inlet",
  "category": "Coastal / Fjord (Mixed)",
  "gnisId": "1398242",
  "gnisUrl": "https://edits.nationalmap.gov/apps/gaz-domestic/public/search/names/1398242",
  "coordinates": {
    "latitude": 61.2181,
    "longitude": -149.9003
  },
  "boundingBox": [
    -150.2551897054444,
    61.0471862445993,
    -149.54541198455556,
    61.388928229400776
  ],
  "horizontalCrs": "EPSG:3338 (NAD83 / Alaska Albers Equal Area Conic)",
  "verticalDatum": "MLLW (<0m marine soundings) / NAVD88 (>0m terrestrial elevation)",
  "maxElevationM": 1729.9,
  "maxDepthM": -53.5,
  "chartId": "NOAA Chart 16665 (Cook Inlet — Approaches to Anchorage)",
  "verifiedFeatures": [
    "ANCHORAGE",
    "POINT WORONZOF LIGHT",
    "COOK INLET",
    "KNIK ARM",
    "TURNAGAIN ARM",
    "FLATTOP MOUNTAIN",
    "O'MALLEY PEAK",
    "WOLVERINE PEAK",
    "POTTER MARSH",
    "CHUGACH FRONT RANGE",
    "FIRE ISLAND LIGHT"
  ],
  "sources": [
    {
      "provider": "NOAA National Centers for Environmental Information (NCEI)",
      "dataset_name": "NOAA NCEI Regional Alaska Bathymetric-Topographic DEM Mosaic (DEM_global_mosaic) & NOAA Chart 16665 (Cook Inlet — Approaches to Anchorage)",
      "dataset_id": "NOAA-NCEI-DEM-MOSAIC-AW-TJ-006",
      "acquisition_method": "Compiled bathymetric-topographic DEM mosaic (integrating NOAA hydrographic survey soundings and USGS 3DEP/IfSAR land elevation)",
      "resolution": "1/3 arc-second (~10m) to 1 arc-second regional coastal DEM mosaic (1400x1400 Float32 extract)",
      "horizontal_crs": "EPSG:4326 (WGS84/NAD83) projected to EPSG:3338 (Alaska Albers)",
      "vertical_datum": "Mixed coastal mosaic: MLLW/MHW marine soundings + NAVD88/MSL terrestrial elevation (requires explicit VDatum separation review per Rule 4)"
    }
  ],
  "contactSheetUrl": "/products/AW-TJ-006/qa/contact-sheet-8panel.webp",
  "verifiedAt": "2026-11-09T17:00:00Z"
}