NOAA S-57 chart cell
Alaska
US4AK7KO
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 632
- S-57 layers
- 23
- Published
- Jun 16, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.50000° N
- South
- 70.20000° N
- West
- 152.40000° W
- East
- 151.20000° W
- Center
- 70.35000° N, 151.80000° W
- Bounds area
- 436 sq nm
- Feature density
- 1.4482 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 27.5
- Smallest layer
- 1
- Largest layer
- 213
- Area sq km
- 1,497
- Features per sq km
- 0.42223
- COALNE Coastline 213
- LAKARE 135
- LNDRGN Land region 67
- LNDARE Land area 66
- RIVERS River 39
- SLOGRD 35
- DEPARE Depth area 15
- DEPCNT Depth contour 11
- M_QUAL Data quality 10
- SLOTOP 10
- OBSTRN Obstruction 6
- SEAARE Sea area 5
- CTNARE Caution area 4
- MAGVAR Magnetic variation 4
- SBDARE Seabed area 4
- ADMARE 1
- AIRARE 1
- CTRPNT 1
- M_COVR Coverage 1
- M_NPUB 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/US4AK7KO.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7KO/3.0/US4AK7KO.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7KO/3.0/US4AK7KO.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7KO/3.0/US4AK7KO.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7KO/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | Jun 16, 2026 | metadata.json |