NOAA S-57 chart cell
Alaska
US4AK7JS
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 538
- S-57 layers
- 28
- Published
- May 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.20000° N
- South
- 69.90000° N
- West
- 147.60000° W
- East
- 146.40000° W
- Center
- 70.05000° N, 147.00000° W
- Bounds area
- 443 sq nm
- Feature density
- 1.215 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 19.2
- Smallest layer
- 1
- Largest layer
- 315
- Area sq km
- 1,519
- Features per sq km
- 0.35424
- LAKARE 315
- COALNE Coastline 57
- RIVERS River 38
- LNDRGN Land region 35
- DEPARE Depth area 15
- DEPCNT Depth contour 12
- SBDARE Seabed area 9
- M_QUAL Data quality 8
- SLOTOP 7
- SEAARE Sea area 5
- CTNARE Caution area 4
- LNDARE Land area 4
- SOUNDG Sounding 4
- BUISGL 3
- OBSTRN Obstruction 3
- SLOGRD 3
- CTRPNT 2
- LNDMRK 2
- MAGVAR Magnetic variation 2
- SILTNK 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/US4AK7JS.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7JS/3.0/US4AK7JS.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7JS/3.0/US4AK7JS.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7JS/3.0/US4AK7JS.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7JS/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | May 22, 2026 | metadata.json |