NOAA S-57 chart cell
Cook Inlet
US4AK4TH
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 808
- S-57 layers
- 35
- Published
- Apr 1, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.90000° N
- South
- 60.60000° N
- West
- 151.80000° W
- East
- 151.20000° W
- Center
- 60.75000° N, 151.50000° W
- Bounds area
- 317 sq nm
- Feature density
- 2.5485 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 23.1
- Smallest layer
- 1
- Largest layer
- 184
- Area sq km
- 1,087
- Features per sq km
- 0.74301
- DEPCNT Depth contour 184
- DEPARE Depth area 178
- UWTROC Underwater rock 142
- SBDARE Seabed area 96
- OBSTRN Obstruction 43
- M_QUAL Data quality 22
- COALNE Coastline 21
- LIGHTS Light 11
- SOUNDG Sounding 11
- LNDRGN Land region 10
- OFSPLF 10
- BCNSPP Special purpose beacon 9
- SLCONS Shoreline construction 7
- CBLSUB 6
- RIVERS River 6
- MAGVAR Magnetic variation 5
- SEAARE Sea area 5
- BUAARE 4
- BUISGL 4
- CTNARE Caution area 4
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/US4AK4TH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4TH/1.0/US4AK4TH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4TH/1.0/US4AK4TH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4TH/1.0/US4AK4TH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4TH/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 1, 2024 | metadata.json |