NOAA S-57 chart cell
Alaska
US4AK7LO
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 954
- S-57 layers
- 27
- Published
- Feb 5, 2021
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.80000° N
- South
- 70.50000° N
- West
- 152.40000° W
- East
- 151.20000° W
- Center
- 70.65000° N, 151.80000° W
- Bounds area
- 430 sq nm
- Feature density
- 2.2186 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 35.3
- Smallest layer
- 1
- Largest layer
- 335
- Area sq km
- 1,475
- Features per sq km
- 0.64685
- LAKARE 335
- COALNE Coastline 220
- LNDRGN Land region 79
- LNDARE Land area 59
- SBDARE Seabed area 59
- DEPCNT Depth contour 49
- DEPARE Depth area 40
- SLOTOP 34
- RIVERS River 24
- CTNARE Caution area 13
- SEAARE Sea area 9
- M_QUAL Data quality 6
- MAGVAR Magnetic variation 6
- CTRPNT 4
- SOUNDG Sounding 3
- BUISGL 2
- SLCONS Shoreline construction 2
- ADMARE 1
- AIRARE 1
- CONZNE 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/US4AK7LO.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7LO/2.0/US4AK7LO.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7LO/2.0/US4AK7LO.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7LO/2.0/US4AK7LO.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7LO/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Feb 5, 2021 | metadata.json |