NOAA S-57 chart cell
Alaska
US4AK3MT
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 1,477
- S-57 layers
- 30
- Published
- Jun 2, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 55.50000° N
- South
- 55.20000° N
- West
- 160.20000° W
- East
- 159.60000° W
- Center
- 55.35000° N, 159.90000° W
- Bounds area
- 369 sq nm
- Feature density
- 4.0035 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 49.2
- Smallest layer
- 1
- Largest layer
- 464
- Area sq km
- 1,265
- Features per sq km
- 1.16724
- UWTROC Underwater rock 464
- DEPARE Depth area 204
- DEPCNT Depth contour 203
- SBDARE Seabed area 150
- COALNE Coastline 136
- LNDARE Land area 106
- WEDKLP 49
- RIVERS River 35
- OBSTRN Obstruction 26
- LNDELV 25
- M_QUAL Data quality 25
- SEAARE Sea area 11
- LNDRGN Land region 8
- LAKARE 6
- SOUNDG Sounding 5
- LNDMRK 4
- SLOTOP 3
- ADMARE 2
- CTNARE Caution area 2
- LIGHTS Light 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/US4AK3MT.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3MT/2.0/US4AK3MT.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3MT/2.0/US4AK3MT.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3MT/2.0/US4AK3MT.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3MT/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Jun 2, 2026 | metadata.json |