NOAA S-57 chart cell
Alaska
US4AK7AD
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 27
- S-57 layers
- 16
- Published
- Jun 3, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 67.50000° N
- South
- 67.20000° N
- West
- 165.60000° W
- East
- 164.40000° W
- Center
- 67.35000° N, 165.00000° W
- Bounds area
- 500 sq nm
- Feature density
- 0.054 / sq nm
Chart Statistics
16 largest layers shown
- Average features per layer
- 1.7
- Smallest layer
- 1
- Largest layer
- 4
- Area sq km
- 1,714
- Features per sq km
- 0.01575
- SOUNDG Sounding 4
- MAGVAR Magnetic variation 3
- CBLSUB 2
- DEPARE Depth area 2
- M_NPUB 2
- M_QUAL Data quality 2
- SBDARE Seabed area 2
- TESARE 2
- CONZNE 1
- COSARE 1
- DEPCNT Depth contour 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- PILBOP 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/US4AK7AD.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7AD/2.0/US4AK7AD.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7AD/2.0/US4AK7AD.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7AD/2.0/US4AK7AD.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7AD/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Jun 3, 2026 | metadata.json |