NOAA S-57 chart cell
Alaska
US4AK4RT
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 602
- S-57 layers
- 22
- Published
- Jan 5, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.30000° N
- South
- 60.00000° N
- West
- 144.60000° W
- East
- 144.00000° W
- Center
- 60.15000° N, 144.30000° W
- Bounds area
- 323 sq nm
- Feature density
- 1.864 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 27.4
- Smallest layer
- 1
- Largest layer
- 94
- Area sq km
- 1,108
- Features per sq km
- 0.54345
- DEPCNT Depth contour 94
- RIVERS River 79
- UWTROC Underwater rock 76
- COALNE Coastline 70
- DEPARE Depth area 65
- LNDARE Land area 63
- SBDARE Seabed area 48
- LNDRGN Land region 41
- BUISGL 20
- LNDELV 10
- OBSTRN Obstruction 9
- SEAARE Sea area 7
- BUAARE 4
- M_QUAL Data quality 4
- CTNARE Caution area 2
- MAGVAR Magnetic variation 2
- SOUNDG Sounding 2
- WATTUR 2
- 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/US4AK4RT.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4RT/1.0/US4AK4RT.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4RT/1.0/US4AK4RT.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4RT/1.0/US4AK4RT.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4RT/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 5, 2024 | metadata.json |