NOAA S-57 chart cell
Cook Inlet - Approaches to Anchorage
US4AK4TI
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 532
- S-57 layers
- 20
- Published
- Apr 21, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.90000° N
- South
- 60.60000° N
- West
- 151.20000° W
- East
- 150.60000° W
- Center
- 60.75000° N, 150.90000° W
- Bounds area
- 317 sq nm
- Feature density
- 1.6779 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 26.6
- Smallest layer
- 1
- Largest layer
- 285
- Area sq km
- 1,087
- Features per sq km
- 0.48921
- UWTROC Underwater rock 285
- DEPCNT Depth contour 81
- DEPARE Depth area 72
- COALNE Coastline 25
- LNDARE Land area 17
- OBSTRN Obstruction 12
- SBDARE Seabed area 6
- SOUNDG Sounding 6
- BUISGL 5
- LNDRGN Land region 4
- RIVERS River 4
- LNDELV 3
- M_QUAL Data quality 3
- CBLSUB 2
- SEAARE Sea area 2
- CTNARE Caution area 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MAGVAR Magnetic variation 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/US4AK4TI.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4TI/1.0/US4AK4TI.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4TI/1.0/US4AK4TI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4TI/1.0/US4AK4TI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4TI/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 21, 2025 | metadata.json |