NOAA S-57 chart cell
Alaska
US4AK7JF
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 411
- S-57 layers
- 26
- Published
- May 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.20000° N
- South
- 69.90000° N
- West
- 163.20000° W
- East
- 162.00000° W
- Center
- 70.05000° N, 162.60000° W
- Bounds area
- 443 sq nm
- Feature density
- 0.9282 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 15.8
- Smallest layer
- 1
- Largest layer
- 79
- Area sq km
- 1,519
- Features per sq km
- 0.27062
- DEPCNT Depth contour 79
- DEPARE Depth area 74
- COALNE Coastline 53
- LNDARE Land area 48
- SBDARE Seabed area 32
- LAKARE 26
- LNDRGN Land region 23
- RIVERS River 20
- M_QUAL Data quality 14
- CTNARE Caution area 11
- OBSTRN Obstruction 6
- SEAARE Sea area 3
- SOUNDG Sounding 3
- WATTUR 3
- BUISGL 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- SLOTOP 2
- CONZNE 1
- COSARE 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/US4AK7JF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7JF/3.0/US4AK7JF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7JF/3.0/US4AK7JF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7JF/3.0/US4AK7JF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7JF/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | May 22, 2026 | metadata.json |