NOAA S-57 chart cell
Alaska
US4AK7KQ
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 789
- S-57 layers
- 24
- Published
- May 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.50000° N
- South
- 70.20000° N
- West
- 150.00000° W
- East
- 148.80000° W
- Center
- 70.35000° N, 149.40000° W
- Bounds area
- 436 sq nm
- Feature density
- 1.808 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 32.9
- Smallest layer
- 1
- Largest layer
- 380
- Area sq km
- 1,497
- Features per sq km
- 0.52712
- LAKARE 380
- COALNE Coastline 115
- DEPARE Depth area 58
- DEPCNT Depth contour 52
- LNDARE Land area 45
- M_QUAL Data quality 33
- LNDRGN Land region 27
- RIVERS River 19
- SEAARE Sea area 13
- CTNARE Caution area 9
- LNDMRK 9
- SBDARE Seabed area 5
- OBSTRN Obstruction 4
- SLOGRD 4
- CTRPNT 3
- SOUNDG Sounding 3
- BUISGL 2
- MAGVAR Magnetic variation 2
- AIRARE 1
- M_COVR Coverage 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/US4AK7KQ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7KQ/3.0/US4AK7KQ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7KQ/3.0/US4AK7KQ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7KQ/3.0/US4AK7KQ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7KQ/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | May 22, 2026 | metadata.json |