NOAA S-57 chart cell
Gulf of Alaska to Sitkalidak Island and Vicinity
US4AK4HF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 982
- S-57 layers
- 30
- Published
- Aug 1, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 57.30000° N
- South
- 57.00000° N
- West
- 153.00000° W
- East
- 152.40000° W
- Center
- 57.15000° N, 152.70000° W
- Bounds area
- 352 sq nm
- Feature density
- 2.79 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 32.7
- Smallest layer
- 1
- Largest layer
- 303
- Area sq km
- 1,207
- Features per sq km
- 0.81342
- UWTROC Underwater rock 303
- WEDKLP 132
- SBDARE Seabed area 102
- COALNE Coastline 87
- DEPARE Depth area 81
- DEPCNT Depth contour 81
- LNDARE Land area 81
- LNDELV 31
- RIVERS River 20
- OBSTRN Obstruction 17
- LNDRGN Land region 6
- M_QUAL Data quality 6
- SEAARE Sea area 5
- SLOGRD 5
- SOUNDG Sounding 5
- SLOTOP 4
- MAGVAR Magnetic variation 2
- TESARE 2
- ADMARE 1
- BCNSPP Special purpose beacon 1
Nearby Chart Cells
Approach usage band
Current Edition Files
The NOAA ZIP archive is the upstream source for this chart cell; the other files are Open Ships generated derivatives for web and GIS use.
- Original NOAA ZIP archive https://www.charts.noaa.gov/ENCs/US4AK4HF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4HF/1.0/US4AK4HF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4HF/1.0/US4AK4HF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4HF/1.0/US4AK4HF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4HF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 1, 2025 | metadata.json |