NOAA S-57 chart cell
Alaska
US4AK6YQ
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 31
- S-57 layers
- 14
- Published
- Mar 4, 2021
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 66.90000° N
- South
- 66.60000° N
- West
- 164.40000° W
- East
- 163.80000° W
- Center
- 66.75000° N, 164.10000° W
- Bounds area
- 256 sq nm
- Feature density
- 0.121 / sq nm
Chart Statistics
14 largest layers shown
- Average features per layer
- 2.2
- Smallest layer
- 1
- Largest layer
- 5
- Area sq km
- 879
- Features per sq km
- 0.03529
- DEPARE Depth area 5
- M_QUAL Data quality 5
- SOUNDG Sounding 4
- DEPCNT Depth contour 3
- SBDARE Seabed area 3
- M_NPUB 2
- MAGVAR Magnetic variation 2
- ADMARE 1
- CBLSUB 1
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- SEAARE Sea 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/US4AK6YQ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK6YQ/1.0/US4AK6YQ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK6YQ/1.0/US4AK6YQ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK6YQ/1.0/US4AK6YQ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK6YQ/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Mar 4, 2021 | metadata.json |