NOAA S-57 chart cell
Lake Superior - Shelter Bay to Williams Island, MI
US4MI2PM
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 124
- S-57 layers
- 20
- Published
- Feb 23, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 46.50000° N
- South
- 46.20000° N
- West
- 87.00000° W
- East
- 86.70000° W
- Center
- 46.35000° N, 86.85000° W
- Bounds area
- 224 sq nm
- Feature density
- 0.5537 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.2
- Smallest layer
- 1
- Largest layer
- 37
- Area sq km
- 768
- Features per sq km
- 0.16144
- DEPCNT Depth contour 37
- DEPARE Depth area 35
- M_QUAL Data quality 6
- UWTROC Underwater rock 6
- LAKARE 5
- SBDARE Seabed area 5
- COALNE Coastline 4
- SEAARE Sea area 4
- SOUNDG Sounding 4
- LNDARE Land area 3
- LNDRGN Land region 3
- RIVERS River 3
- OBSTRN Obstruction 2
- BUAARE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MAGVAR Magnetic variation 1
- RESARE 1
- SLCONS Shoreline construction 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/US4MI2PM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MI2PM/3.0/US4MI2PM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MI2PM/3.0/US4MI2PM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MI2PM/3.0/US4MI2PM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MI2PM/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | Feb 23, 2026 | metadata.json |