NOAA S-57 chart cell
Alaska
US4AK4UM
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 439
- S-57 layers
- 20
- Published
- Nov 16, 2023
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 61.20000° N
- South
- 60.90000° N
- West
- 148.80000° W
- East
- 148.20000° W
- Center
- 61.05000° N, 148.50000° W
- Bounds area
- 314 sq nm
- Feature density
- 1.3977 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 22
- Smallest layer
- 1
- Largest layer
- 107
- Area sq km
- 1,077
- Features per sq km
- 0.40751
- DEPCNT Depth contour 107
- DEPARE Depth area 101
- UWTROC Underwater rock 66
- COALNE Coastline 47
- LNDARE Land area 27
- ICEARE 20
- M_QUAL Data quality 20
- SEAARE Sea area 16
- SBDARE Seabed area 13
- LNDELV 4
- MAGVAR Magnetic variation 4
- SOUNDG Sounding 3
- UNSARE 3
- OBSTRN Obstruction 2
- BUISGL 1
- LNDRGN Land region 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MORFAC 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/US4AK4UM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4UM/1.0/US4AK4UM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4UM/1.0/US4AK4UM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4UM/1.0/US4AK4UM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4UM/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Nov 16, 2023 | metadata.json |