NOAA S-57 chart cell
Rat Islands, AK
US4AK1DX
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 581
- S-57 layers
- 27
- Published
- Apr 12, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 52.20000° N
- South
- 51.90000° N
- West
- 178.20000° E
- East
- 178.80000° E
- Center
- 52.05000° N, 178.50000° E
- Bounds area
- 399 sq nm
- Feature density
- 1.456 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 21.5
- Smallest layer
- 1
- Largest layer
- 125
- Area sq km
- 1,369
- Features per sq km
- 0.4245
- LNDARE Land area 125
- DEPCNT Depth contour 115
- DEPARE Depth area 99
- UWTROC Underwater rock 83
- COALNE Coastline 41
- OBSTRN Obstruction 24
- RIVERS River 21
- LNDELV 15
- SEAARE Sea area 11
- LNDRGN Land region 10
- SOUNDG Sounding 8
- SBDARE Seabed area 5
- M_QUAL Data quality 4
- ADMARE 3
- M_NPUB 2
- MAGVAR Magnetic variation 2
- SLOTOP 2
- WEDKLP 2
- CONZNE 1
- EXEZNE 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/US4AK1DX.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK1DX/1.0/US4AK1DX.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK1DX/1.0/US4AK1DX.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK1DX/1.0/US4AK1DX.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK1DX/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 12, 2024 | metadata.json |