NOAA S-57 chart cell
Alaska
US4AK4RS
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 331
- S-57 layers
- 30
- Published
- Mar 14, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.30000° N
- South
- 60.00000° N
- West
- 145.20000° W
- East
- 144.60000° W
- Center
- 60.15000° N, 144.90000° W
- Bounds area
- 323 sq nm
- Feature density
- 1.0249 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 11
- Smallest layer
- 1
- Largest layer
- 70
- Area sq km
- 1,108
- Features per sq km
- 0.29881
- COALNE Coastline 70
- LNDARE Land area 67
- RIVERS River 32
- SBDARE Seabed area 27
- UWTROC Underwater rock 26
- LNDRGN Land region 22
- DEPARE Depth area 20
- DEPCNT Depth contour 18
- M_QUAL Data quality 14
- BCNSPP Special purpose beacon 3
- DAYMAR 3
- LIGHTS Light 3
- M_NPUB 3
- BOYSAW 2
- CTNARE Caution area 2
- MAGVAR Magnetic variation 2
- SEAARE Sea area 2
- SOUNDG Sounding 2
- WATTUR 2
- ADMARE 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/US4AK4RS.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4AK4RS/1.1/US4AK4RS.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4AK4RS/1.1/US4AK4RS.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4RS/1.1/US4AK4RS.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4RS/1.1/US4AK4RS.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4RS/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Mar 14, 2025 | metadata.json |