NOAA S-57 chart cell
Seward
US4AK4RK
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 231
- S-57 layers
- 41
- Published
- Sep 29, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.30000° N
- South
- 60.00000° N
- West
- 150.00000° W
- East
- 149.40000° W
- Center
- 60.15000° N, 149.70000° W
- Bounds area
- 323 sq nm
- Feature density
- 0.7152 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 5.6
- Smallest layer
- 1
- Largest layer
- 39
- Area sq km
- 1,108
- Features per sq km
- 0.20853
- SLCONS Shoreline construction 39
- DEPARE Depth area 18
- PONTON 17
- DEPCNT Depth contour 15
- COALNE Coastline 14
- UWTROC Underwater rock 13
- ICEARE 12
- RIVERS River 12
- OBSTRN Obstruction 9
- M_QUAL Data quality 8
- SBDARE Seabed area 7
- MORFAC 6
- PIPSOL 6
- LNDRGN Land region 5
- CBLSUB 4
- LNDARE Land area 4
- SEAARE Sea area 4
- SILTNK 4
- LAKARE 3
- LIGHTS Light 3
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/US4AK4RK.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4RK/2.0/US4AK4RK.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4RK/2.0/US4AK4RK.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4RK/2.0/US4AK4RK.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4RK/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Sep 29, 2025 | metadata.json |