NOAA S-57 chart cell
Aliulik Peninsula, AK and Vicinity; Alitak Bay
US4AK4GD
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 2,593
- S-57 layers
- 36
- Published
- Aug 4, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 57.00000° N
- South
- 56.70000° N
- West
- 154.20000° W
- East
- 153.60000° W
- Center
- 56.85000° N, 153.90000° W
- Bounds area
- 355 sq nm
- Feature density
- 7.3078 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 72
- Smallest layer
- 1
- Largest layer
- 574
- Area sq km
- 1,217
- Features per sq km
- 2.13061
- UWTROC Underwater rock 574
- DEPCNT Depth contour 406
- DEPARE Depth area 388
- SBDARE Seabed area 277
- COALNE Coastline 209
- LNDARE Land area 175
- WEDKLP 119
- RIVERS River 95
- LNDELV 71
- OBSTRN Obstruction 58
- M_QUAL Data quality 39
- SOUNDG Sounding 31
- LAKARE 28
- SEAARE Sea area 25
- SLOTOP 24
- LNDRGN Land region 20
- SLOGRD 9
- BUISGL 7
- BOYLAT Lateral buoy 6
- SNDWAV 5
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/US4AK4GD.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4GD/1.0/US4AK4GD.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4GD/1.0/US4AK4GD.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4GD/1.0/US4AK4GD.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4GD/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 4, 2025 | metadata.json |