NOAA S-57 chart cell
Alaska
US4AK3TD
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 24
- S-57 layers
- 14
- Published
- May 27, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 57.60000° N
- South
- 57.30000° N
- West
- 169.80000° W
- East
- 169.20000° W
- Center
- 57.45000° N, 169.50000° W
- Bounds area
- 349 sq nm
- Feature density
- 0.0687 / sq nm
Chart Statistics
14 largest layers shown
- Average features per layer
- 1.7
- Smallest layer
- 1
- Largest layer
- 4
- Area sq km
- 1,197
- Features per sq km
- 0.02004
- DEPARE Depth area 4
- SBDARE Seabed area 4
- DEPCNT Depth contour 3
- MAGVAR Magnetic variation 2
- SOUNDG Sounding 2
- CONZNE 1
- COSARE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- M_QUAL Data quality 1
- SEAARE Sea area 1
- TESARE 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/US4AK3TD.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3TD/2.0/US4AK3TD.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3TD/2.0/US4AK3TD.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3TD/2.0/US4AK3TD.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3TD/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | May 27, 2026 | metadata.json |