NOAA S-57 chart cell
Lake Michigan - Beaver Island to Grays Reef, MI
US4MI2NR
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 831
- S-57 layers
- 30
- Published
- Sep 17, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 45.90000° N
- South
- 45.60000° N
- West
- 85.50000° W
- East
- 85.20000° W
- Center
- 45.75000° N, 85.35000° W
- Bounds area
- 226 sq nm
- Feature density
- 3.6707 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 27.7
- Smallest layer
- 1
- Largest layer
- 256
- Area sq km
- 776
- Features per sq km
- 1.07019
- DEPCNT Depth contour 256
- DEPARE Depth area 248
- UWTROC Underwater rock 92
- COALNE Coastline 56
- OBSTRN Obstruction 31
- LNDARE Land area 30
- LNDRGN Land region 27
- SBDARE Seabed area 17
- SEAARE Sea area 10
- BOYLAT Lateral buoy 8
- FSHFAC 8
- M_QUAL Data quality 8
- SOUNDG Sounding 6
- RECTRC 5
- CTRPNT 4
- CBLSUB 3
- LIGHTS Light 3
- FOGSIG 2
- LAKARE 2
- MAGVAR Magnetic variation 2
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/US4MI2NR.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MI2NR/2.0/US4MI2NR.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MI2NR/2.0/US4MI2NR.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MI2NR/2.0/US4MI2NR.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MI2NR/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Sep 17, 2025 | metadata.json |