NOAA S-57 chart cell
Alaska
US4AK7EC
- Usage band
- Approach · code 4
- Current edition
- 4.0
- Features
- 202
- S-57 layers
- 22
- Published
- May 13, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 68.70000° N
- South
- 68.40000° N
- West
- 166.80000° W
- East
- 165.60000° W
- Center
- 68.55000° N, 166.20000° W
- Bounds area
- 475 sq nm
- Feature density
- 0.4256 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 9.2
- Smallest layer
- 1
- Largest layer
- 46
- Area sq km
- 1,628
- Features per sq km
- 0.1241
- LNDARE Land area 46
- RIVERS River 26
- LNDRGN Land region 22
- DEPARE Depth area 19
- LNDELV 19
- COALNE Coastline 17
- DEPCNT Depth contour 12
- LAKARE 7
- UWTROC Underwater rock 7
- SOUNDG Sounding 5
- SEAARE Sea area 4
- CTNARE Caution area 3
- M_QUAL Data quality 3
- SBDARE Seabed area 3
- MAGVAR Magnetic variation 2
- CONZNE 1
- COSARE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NPUB 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/US4AK7EC.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7EC/4.0/US4AK7EC.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7EC/4.0/US4AK7EC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7EC/4.0/US4AK7EC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7EC/4.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 4.0 | May 13, 2026 | metadata.json |