NOAA S-57 chart cell
Alaska
US4AK3MQ
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,401
- S-57 layers
- 35
- Published
- Nov 29, 2023
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 55.50000° N
- South
- 55.20000° N
- West
- 162.00000° W
- East
- 161.40000° W
- Center
- 55.35000° N, 161.70000° W
- Bounds area
- 369 sq nm
- Feature density
- 3.7975 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 40
- Smallest layer
- 1
- Largest layer
- 309
- Area sq km
- 1,265
- Features per sq km
- 1.10718
- DEPCNT Depth contour 309
- DEPARE Depth area 265
- UWTROC Underwater rock 192
- SBDARE Seabed area 184
- COALNE Coastline 92
- LNDARE Land area 63
- RIVERS River 57
- OBSTRN Obstruction 51
- WEDKLP 49
- M_QUAL Data quality 34
- SLOTOP 25
- LNDRGN Land region 17
- SEAARE Sea area 11
- LNDELV 9
- SOUNDG Sounding 9
- MAGVAR Magnetic variation 6
- LAKARE 4
- SLOGRD 4
- DAYMAR 2
- LIGHTS Light 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/US4AK3MQ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3MQ/1.0/US4AK3MQ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3MQ/1.0/US4AK3MQ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3MQ/1.0/US4AK3MQ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3MQ/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Nov 29, 2023 | metadata.json |