NOAA S-57 chart cell
Prince William Sound, Alaska
US4AK4TO
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 2,218
- S-57 layers
- 36
- Published
- Apr 10, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.90000° N
- South
- 60.60000° N
- West
- 147.60000° W
- East
- 147.00000° W
- Center
- 60.75000° N, 147.30000° W
- Bounds area
- 317 sq nm
- Feature density
- 6.9956 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 61.6
- Smallest layer
- 1
- Largest layer
- 644
- Area sq km
- 1,087
- Features per sq km
- 2.0396
- UWTROC Underwater rock 644
- DEPARE Depth area 483
- DEPCNT Depth contour 482
- SBDARE Seabed area 268
- LNDARE Land area 126
- COALNE Coastline 51
- RIVERS River 27
- M_QUAL Data quality 25
- LNDELV 23
- SEAARE Sea area 22
- SOUNDG Sounding 11
- OBSTRN Obstruction 9
- LNDRGN Land region 8
- CBLSUB 7
- MAGVAR Magnetic variation 5
- ACHARE Anchorage area 2
- LAKARE 2
- MORFAC 2
- TSEZNE 2
- TSSBND 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/US4AK4TO.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4TO/2.0/US4AK4TO.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4TO/2.0/US4AK4TO.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4TO/2.0/US4AK4TO.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4TO/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Apr 10, 2026 | metadata.json |