NOAA S-57 chart cell
Shelikof Strait and Portage Bay
US4AK4IA
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 657
- S-57 layers
- 24
- Published
- Apr 10, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 57.60000° N
- South
- 57.30000° N
- West
- 156.00000° W
- East
- 155.40000° W
- Center
- 57.45000° N, 155.70000° W
- Bounds area
- 349 sq nm
- Feature density
- 1.8819 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 27.4
- Smallest layer
- 1
- Largest layer
- 193
- Area sq km
- 1,197
- Features per sq km
- 0.54867
- DEPCNT Depth contour 193
- DEPARE Depth area 171
- UWTROC Underwater rock 104
- SBDARE Seabed area 102
- RIVERS River 16
- OBSTRN Obstruction 12
- LNDELV 11
- M_QUAL Data quality 9
- SOUNDG Sounding 9
- LNDARE Land area 4
- SEAARE Sea area 4
- COALNE Coastline 3
- LNDRGN Land region 3
- MAGVAR Magnetic variation 3
- LNDMRK 2
- TESARE 2
- WATTUR 2
- ADMARE 1
- CBLSUB 1
- CONZNE 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/US4AK4IA.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4IA/1.0/US4AK4IA.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4IA/1.0/US4AK4IA.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4IA/1.0/US4AK4IA.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4IA/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 10, 2024 | metadata.json |