NOAA S-57 chart cell
Lake Michigan - Grays Reef to Sturgeon Bay Point, MI
US4MI2NS
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 501
- S-57 layers
- 38
- Published
- Sep 17, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 45.90000° N
- South
- 45.60000° N
- West
- 85.20000° W
- East
- 84.90000° W
- Center
- 45.75000° N, 85.05000° W
- Bounds area
- 226 sq nm
- Feature density
- 2.213 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 13.2
- Smallest layer
- 1
- Largest layer
- 116
- Area sq km
- 776
- Features per sq km
- 0.64521
- DEPCNT Depth contour 116
- DEPARE Depth area 115
- UWTROC Underwater rock 38
- OBSTRN Obstruction 29
- SBDARE Seabed area 29
- SEAARE Sea area 15
- FSHFAC 14
- LNDARE Land area 14
- LNDRGN Land region 14
- BOYLAT Lateral buoy 11
- RECTRC 11
- BUISGL 9
- COALNE Coastline 9
- LIGHTS Light 9
- WRECKS Wreck 8
- SOUNDG Sounding 7
- LNDMRK 6
- M_QUAL Data quality 6
- PILPNT 6
- CBLSUB 5
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/US4MI2NS.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MI2NS/3.0/US4MI2NS.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MI2NS/3.0/US4MI2NS.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MI2NS/3.0/US4MI2NS.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MI2NS/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | Sep 17, 2025 | metadata.json |