NOAA S-57 chart cell
Alaska
US4AK7JU
- Usage band
- Approach · code 4
- Current edition
- 4.0
- Features
- 505
- S-57 layers
- 29
- Published
- May 21, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.20000° N
- South
- 69.90000° N
- West
- 145.20000° W
- East
- 144.00000° W
- Center
- 70.05000° N, 144.60000° W
- Bounds area
- 443 sq nm
- Feature density
- 1.1405 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 17.4
- Smallest layer
- 1
- Largest layer
- 126
- Area sq km
- 1,519
- Features per sq km
- 0.33251
- COALNE Coastline 126
- RIVERS River 72
- DEPARE Depth area 52
- DEPCNT Depth contour 51
- LNDARE Land area 33
- SBDARE Seabed area 30
- LNDRGN Land region 28
- LAKARE 26
- SLOTOP 25
- M_QUAL Data quality 13
- SOUNDG Sounding 6
- CTNARE Caution area 5
- LNDMRK 4
- MAGVAR Magnetic variation 4
- OBSTRN Obstruction 4
- SLOGRD 4
- SMCFAC 3
- UWTROC Underwater rock 3
- WATTUR 3
- ACHARE Anchorage area 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/US4AK7JU.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7JU/4.0/US4AK7JU.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7JU/4.0/US4AK7JU.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7JU/4.0/US4AK7JU.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7JU/4.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 4.0 | May 21, 2026 | metadata.json |