NOAA S-57 chart cell
Cape St. Elias to Shumagin Islands;Semidi Islands
US2AK20M
- Usage band
- General · code 2
- Current edition
- 17.2
- Features
- 5,529
- S-57 layers
- 55
- Published
- Jan 12, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 61.70662° N
- South
- 54.33908° N
- West
- 156.75402° W
- East
- 141.95026° W
- Center
- 58.02285° N, 149.35214° W
- Bounds area
- 208,073 sq nm
- Feature density
- 0.0266 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 100.5
- Smallest layer
- 1
- Largest layer
- 957
- Area sq km
- 713,672
- Features per sq km
- 0.00775
- LNDARE Land area 957
- UWTROC Underwater rock 819
- COALNE Coastline 761
- RIVERS River 443
- SBDARE Seabed area 366
- DEPCNT Depth contour 280
- DEPARE Depth area 247
- LNDELV 231
- SLOGRD 228
- SEAARE Sea area 181
- LNDRGN Land region 137
- ICEARE 100
- OBSTRN Obstruction 98
- LIGHTS Light 82
- TESARE 73
- BUAARE 50
- SLOTOP 46
- DAYMAR 45
- BCNSPP Special purpose beacon 43
- MAGVAR Magnetic variation 41
Nearby Chart Cells
General 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/US2AK20M.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/general/US2AK20M/17.2/US2AK20M.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/general/US2AK20M/17.2/US2AK20M.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/general/US2AK20M/17.2/US2AK20M.002
- GeoJSON https://charts.openships.ai/noaa/s57/general/US2AK20M/17.2/US2AK20M.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/general/US2AK20M/17.2/US2AK20M.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/general/US2AK20M/17.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 17.2 | Jan 12, 2026 | metadata.json |