NOAA S-57 chart cell
Sitkalidak Island and Vicinity, AK
US4AK4HE
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 2,029
- S-57 layers
- 37
- Published
- Aug 1, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 57.30000° N
- South
- 57.00000° N
- West
- 153.60000° W
- East
- 153.00000° W
- Center
- 57.15000° N, 153.30000° W
- Bounds area
- 352 sq nm
- Feature density
- 5.7646 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 54.8
- Smallest layer
- 1
- Largest layer
- 600
- Area sq km
- 1,207
- Features per sq km
- 1.68068
- UWTROC Underwater rock 600
- COALNE Coastline 207
- DEPARE Depth area 188
- DEPCNT Depth contour 186
- WEDKLP 170
- LNDARE Land area 148
- LNDELV 133
- SBDARE Seabed area 124
- RIVERS River 111
- SEAARE Sea area 27
- OBSTRN Obstruction 21
- SLOGRD 20
- M_QUAL Data quality 13
- LNDRGN Land region 11
- LAKARE 9
- SOUNDG Sounding 7
- BCNLAT Lateral beacon 6
- BUISGL 6
- DAYMAR 6
- SLOTOP 6
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/US4AK4HE.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4HE/1.0/US4AK4HE.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4HE/1.0/US4AK4HE.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4HE/1.0/US4AK4HE.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4HE/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 1, 2025 | metadata.json |