{
  "certificateVersion": "2026.11-V2",
  "sku": "AW-RC-006",
  "slug": "matanuska-river",
  "name": "Matanuska River — Matanuska Glacier to Palmer Braids",
  "category": "River / Glacial Braids",
  "gnisId": "1406055",
  "gnisUrl": "https://edits.nationalmap.gov/apps/gaz-domestic/public/search/names/1406055",
  "coordinates": {
    "latitude": 61.78,
    "longitude": -148.45
  },
  "boundingBox": [
    214686,
    1231462,
    368686,
    1385462
  ],
  "horizontalCrs": "EPSG:3338 (NAD83 / Alaska Albers Equal Area Conic)",
  "verticalDatum": "NAVD88 (North American Vertical Datum of 1988)",
  "maxElevationM": 2480,
  "maxDepthM": null,
  "chartId": null,
  "verifiedFeatures": [],
  "sources": [
    {
      "provider": "USGS National Hydrography Dataset (NHD)",
      "dataset_name": "USGS National Hydrography Dataset (NHD) Flowlines & Waterbodies",
      "dataset_id": "USGS-NHD-HYDRO-AW-RC-006",
      "acquisition_method": "Authoritative USGS NHD vector hydrographic network & reach geometry",
      "resolution": "1:24,000 / 1:63,360 High-Resolution Alaska NHD",
      "horizontal_crs": "EPSG:3338 (NAD83 / Alaska Albers Equal Area Conic)",
      "vertical_datum": "NOT_APPLICABLE (2D hydrographic vector geometry)"
    },
    {
      "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-RC-006",
      "acquisition_method": "IfSAR (Interferometric Synthetic Aperture Radar — standard Alaska 5m 3DEP DEM)",
      "resolution": "5m native IfSAR DEM resampled to Float32 watershed grid",
      "horizontal_crs": "EPSG:3338 (NAD83 / Alaska Albers Equal Area Conic)",
      "vertical_datum": "NAVD88 (North American Vertical Datum of 1988, meters)"
    }
  ],
  "contactSheetUrl": "/products/AW-RC-006/qa/contact-sheet-8panel.webp",
  "verifiedAt": "2026-11-09T17:00:00Z"
}