NOAA S-57 chart cell
Gulf of Alaska to Port Chatham; Kachemak Bay
US4AK4OH
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,831
- S-57 layers
- 34
- Published
- Apr 2, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 59.40000° N
- South
- 59.10000° N
- West
- 151.80000° W
- East
- 151.20000° W
- Center
- 59.25000° N, 151.50000° W
- Bounds area
- 332 sq nm
- Feature density
- 5.519 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 53.9
- Smallest layer
- 1
- Largest layer
- 551
- Area sq km
- 1,138
- Features per sq km
- 1.60907
- UWTROC Underwater rock 551
- DEPCNT Depth contour 236
- DEPARE Depth area 233
- LNDARE Land area 148
- SBDARE Seabed area 120
- WEDKLP 103
- LNDELV 95
- COALNE Coastline 93
- OBSTRN Obstruction 84
- RIVERS River 74
- SEAARE Sea area 19
- M_QUAL Data quality 9
- WATTUR 9
- SOUNDG Sounding 7
- LAKARE 6
- LNDRGN Land region 6
- LIGHTS Light 5
- SLOTOP 5
- BOYLAT Lateral buoy 3
- DAYMAR 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/US4AK4OH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4OH/1.0/US4AK4OH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4OH/1.0/US4AK4OH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4OH/1.0/US4AK4OH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4OH/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 2, 2024 | metadata.json |