NOAA S-57 chart cell
Alaska
US4AK7KR
- Usage band
- Approach · code 4
- Current edition
- 4.0
- Features
- 1,445
- S-57 layers
- 42
- Published
- May 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.50000° N
- South
- 70.20000° N
- West
- 148.80000° W
- East
- 147.60000° W
- Center
- 70.35000° N, 148.20000° W
- Bounds area
- 436 sq nm
- Feature density
- 3.3112 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 34.4
- Smallest layer
- 1
- Largest layer
- 439
- Area sq km
- 1,497
- Features per sq km
- 0.96539
- COALNE Coastline 439
- LNDARE Land area 313
- DEPCNT Depth contour 133
- DEPARE Depth area 113
- LAKARE 100
- OBSTRN Obstruction 63
- LNDRGN Land region 54
- RIVERS River 51
- SBDARE Seabed area 39
- SLOGRD 18
- LNDMRK 11
- M_QUAL Data quality 11
- SEAARE Sea area 11
- CTNARE Caution area 10
- BOYSPP Special purpose buoy 6
- OFSPLF 6
- SOUNDG Sounding 6
- BUISGL 5
- LIGHTS Light 5
- MORFAC 5
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/US4AK7KR.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7KR/4.0/US4AK7KR.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7KR/4.0/US4AK7KR.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7KR/4.0/US4AK7KR.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7KR/4.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 4.0 | May 22, 2026 | metadata.json |