NOAA S-57 chart cell
Alaska
US4AK7IF
- Usage band
- Approach · code 4
- Current edition
- 4.0
- Features
- 563
- S-57 layers
- 27
- Published
- May 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 69.90000° N
- South
- 69.60000° N
- West
- 163.20000° W
- East
- 162.00000° W
- Center
- 69.75000° N, 162.60000° W
- Bounds area
- 449 sq nm
- Feature density
- 1.2534 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 20.9
- Smallest layer
- 1
- Largest layer
- 101
- Area sq km
- 1,541
- Features per sq km
- 0.36544
- DEPARE Depth area 101
- DEPCNT Depth contour 99
- COALNE Coastline 90
- LNDARE Land area 57
- LNDRGN Land region 50
- LAKARE 39
- RIVERS River 20
- CTNARE Caution area 15
- SBDARE Seabed area 15
- BUISGL 13
- OBSTRN Obstruction 13
- M_QUAL Data quality 11
- SILTNK 7
- SEAARE Sea area 5
- MAGVAR Magnetic variation 4
- UNSARE 4
- CTRPNT 3
- LNDMRK 3
- SLOTOP 3
- SOUNDG Sounding 3
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/US4AK7IF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7IF/4.0/US4AK7IF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7IF/4.0/US4AK7IF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7IF/4.0/US4AK7IF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7IF/4.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 4.0 | May 22, 2026 | metadata.json |