NOAA S-57 chart cell
Alaska
US4AK4SS
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 193
- S-57 layers
- 18
- Published
- Jan 5, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.60000° N
- South
- 60.30000° N
- West
- 145.20000° W
- East
- 144.60000° W
- Center
- 60.45000° N, 144.90000° W
- Bounds area
- 320 sq nm
- Feature density
- 0.6031 / sq nm
Chart Statistics
18 largest layers shown
- Average features per layer
- 10.7
- Smallest layer
- 1
- Largest layer
- 47
- Area sq km
- 1,098
- Features per sq km
- 0.17584
- COALNE Coastline 47
- LNDARE Land area 37
- RIVERS River 31
- DEPARE Depth area 21
- DEPCNT Depth contour 15
- SLOGRD 7
- M_NPUB 6
- M_QUAL Data quality 6
- SLOTOP 5
- ICEARE 3
- LNDELV 3
- LNDRGN Land region 3
- SEAARE Sea area 3
- MAGVAR Magnetic variation 2
- BUAARE 1
- M_COVR Coverage 1
- M_NSYS 1
- SBDARE Seabed area 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/US4AK4SS.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4SS/1.0/US4AK4SS.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4SS/1.0/US4AK4SS.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4SS/1.0/US4AK4SS.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4SS/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 5, 2024 | metadata.json |