NOAA S-57 chart cell
Alaska
US4AK7NL
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 515
- S-57 layers
- 27
- Published
- Jun 18, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 71.40000° N
- South
- 71.10000° N
- West
- 156.00000° W
- East
- 154.80000° W
- Center
- 71.25000° N, 155.40000° W
- Bounds area
- 417 sq nm
- Feature density
- 1.2346 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 19.1
- Smallest layer
- 1
- Largest layer
- 107
- Area sq km
- 1,431
- Features per sq km
- 0.35994
- COALNE Coastline 107
- DEPCNT Depth contour 62
- LAKARE 59
- LNDRGN Land region 59
- DEPARE Depth area 51
- LNDARE Land area 47
- RIVERS River 24
- SLOTOP 21
- M_QUAL Data quality 16
- SBDARE Seabed area 11
- SEAARE Sea area 11
- WATTUR 10
- TESARE 9
- OBSTRN Obstruction 7
- SOUNDG Sounding 5
- CTNARE Caution area 3
- MAGVAR Magnetic variation 2
- WEDKLP 2
- ACHARE Anchorage area 1
- ADMARE 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/US4AK7NL.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7NL/3.0/US4AK7NL.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7NL/3.0/US4AK7NL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7NL/3.0/US4AK7NL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7NL/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | Jun 18, 2026 | metadata.json |