NOAA S-57 chart cell
Alaska
US4AK7LQ
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 511
- S-57 layers
- 29
- Published
- May 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.80000° N
- South
- 70.50000° N
- West
- 150.00000° W
- East
- 148.80000° W
- Center
- 70.65000° N, 149.40000° W
- Bounds area
- 430 sq nm
- Feature density
- 1.1884 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 17.6
- Smallest layer
- 1
- Largest layer
- 126
- Area sq km
- 1,475
- Features per sq km
- 0.34648
- DEPCNT Depth contour 126
- DEPARE Depth area 117
- SBDARE Seabed area 75
- COALNE Coastline 48
- LAKARE 48
- LNDARE Land area 30
- LNDRGN Land region 11
- CTNARE Caution area 9
- OBSTRN Obstruction 7
- SEAARE Sea area 6
- CBLSUB 4
- MAGVAR Magnetic variation 4
- SLCONS Shoreline construction 4
- M_QUAL Data quality 3
- SOUNDG Sounding 3
- CTRPNT 2
- LNDMRK 2
- ADMARE 1
- CONZNE 1
- COSARE 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/US4AK7LQ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7LQ/3.0/US4AK7LQ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7LQ/3.0/US4AK7LQ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7LQ/3.0/US4AK7LQ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7LQ/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | May 22, 2026 | metadata.json |