NOAA S-57 chart cell
Prince William Sound, Alaska
US4AK4SP
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 895
- S-57 layers
- 40
- Published
- May 15, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.60000° N
- South
- 60.30000° N
- West
- 147.00000° W
- East
- 146.40000° W
- Center
- 60.45000° N, 146.70000° W
- Bounds area
- 320 sq nm
- Feature density
- 2.7968 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 22.4
- Smallest layer
- 1
- Largest layer
- 173
- Area sq km
- 1,098
- Features per sq km
- 0.8154
- DEPCNT Depth contour 173
- UWTROC Underwater rock 161
- DEPARE Depth area 117
- SBDARE Seabed area 106
- LNDARE Land area 75
- COALNE Coastline 58
- OBSTRN Obstruction 42
- RIVERS River 37
- LAKARE 23
- SLOGRD 17
- M_QUAL Data quality 13
- WEDKLP 13
- SEAARE Sea area 10
- LNDRGN Land region 7
- SOUNDG Sounding 6
- LIGHTS Light 5
- DAYMAR 3
- RECTRC 3
- BCNLAT Lateral beacon 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/US4AK4SP.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4SP/2.0/US4AK4SP.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4SP/2.0/US4AK4SP.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4SP/2.0/US4AK4SP.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4SP/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | May 15, 2026 | metadata.json |