NOAA S-57 chart cell
Gulf of Alaska
US4AK4IG
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 783
- S-57 layers
- 29
- Published
- Aug 1, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 57.60000° N
- South
- 57.30000° N
- West
- 152.40000° W
- East
- 151.80000° W
- Center
- 57.45000° N, 152.10000° W
- Bounds area
- 349 sq nm
- Feature density
- 2.2428 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 27
- Smallest layer
- 1
- Largest layer
- 162
- Area sq km
- 1,197
- Features per sq km
- 0.65389
- UWTROC Underwater rock 162
- WEDKLP 161
- SBDARE Seabed area 141
- DEPCNT Depth contour 48
- DEPARE Depth area 42
- COALNE Coastline 41
- LNDARE Land area 39
- LNDELV 30
- WATTUR 22
- SLOTOP 20
- RIVERS River 14
- LAKARE 12
- OBSTRN Obstruction 11
- M_QUAL Data quality 10
- SOUNDG Sounding 8
- LNDRGN Land region 3
- MAGVAR Magnetic variation 3
- BUISGL 2
- CBLSUB 2
- CTNARE Caution area 2
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/US4AK4IG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4IG/1.0/US4AK4IG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4IG/1.0/US4AK4IG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4IG/1.0/US4AK4IG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4IG/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 1, 2025 | metadata.json |