NOAA S-57 chart cell
Alaska
US4AK7NK
- Usage band
- Approach · code 4
- Current edition
- 5.0
- Features
- 629
- S-57 layers
- 31
- Published
- Jun 18, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 71.40000° N
- South
- 71.10000° N
- West
- 157.20000° W
- East
- 156.00000° W
- Center
- 71.25000° N, 156.60000° W
- Bounds area
- 417 sq nm
- Feature density
- 1.5079 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 20.3
- Smallest layer
- 1
- Largest layer
- 190
- Area sq km
- 1,431
- Features per sq km
- 0.43962
- LAKARE 190
- RIVERS River 80
- LNDRGN Land region 66
- DEPCNT Depth contour 64
- DEPARE Depth area 59
- COALNE Coastline 50
- M_QUAL Data quality 17
- SLOTOP 16
- LNDARE Land area 14
- SBDARE Seabed area 13
- LNDMRK 11
- SEAARE Sea area 7
- SOUNDG Sounding 7
- CTNARE Caution area 6
- SILTNK 5
- MAGVAR Magnetic variation 4
- OBSTRN Obstruction 4
- AIRARE 2
- RDOSTA 2
- ACHARE Anchorage area 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/US4AK7NK.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7NK/5.0/US4AK7NK.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7NK/5.0/US4AK7NK.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7NK/5.0/US4AK7NK.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7NK/5.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 5.0 | Jun 18, 2026 | metadata.json |