NOAA S-57 chart cell
Rat Islands, AK
US4AK1DV
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 2,137
- S-57 layers
- 29
- Published
- Apr 1, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 52.20000° N
- South
- 51.90000° N
- West
- 177.00000° E
- East
- 177.60000° E
- Center
- 52.05000° N, 177.30000° E
- Bounds area
- 399 sq nm
- Feature density
- 5.3553 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 73.7
- Smallest layer
- 1
- Largest layer
- 1,041
- Area sq km
- 1,369
- Features per sq km
- 1.56137
- LNDARE Land area 1,041
- COALNE Coastline 223
- DEPCNT Depth contour 207
- DEPARE Depth area 184
- UWTROC Underwater rock 129
- SBDARE Seabed area 69
- OBSTRN Obstruction 68
- LNDRGN Land region 52
- RIVERS River 40
- LNDELV 29
- SEAARE Sea area 18
- WEDKLP 15
- WATTUR 13
- WRECKS Wreck 12
- M_QUAL Data quality 8
- SLCONS Shoreline construction 5
- SOUNDG Sounding 5
- DMPGRD 4
- MAGVAR Magnetic variation 3
- LAKARE 2
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/US4AK1DV.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4AK1DV/1.1/US4AK1DV.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4AK1DV/1.1/US4AK1DV.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK1DV/1.1/US4AK1DV.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK1DV/1.1/US4AK1DV.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK1DV/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Apr 1, 2026 | metadata.json |