NOAA S-57 chart cell
Lake Huron - Thunder Bay and South Point to Sturgeon Point, MI
US4MI1KI
- Usage band
- Approach · code 4
- Current edition
- 1.2
- Features
- 310
- S-57 layers
- 29
- Published
- Aug 7, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 45.00000° N
- South
- 44.70000° N
- West
- 83.40000° W
- East
- 83.10000° W
- Center
- 44.85000° N, 83.25000° W
- Bounds area
- 230 sq nm
- Feature density
- 1.3478 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 10.7
- Smallest layer
- 1
- Largest layer
- 71
- Area sq km
- 789
- Features per sq km
- 0.39294
- DEPARE Depth area 71
- DEPCNT Depth contour 70
- UWTROC Underwater rock 41
- M_QUAL Data quality 26
- SBDARE Seabed area 14
- COALNE Coastline 12
- OBSTRN Obstruction 12
- LNDARE Land area 10
- WRECKS Wreck 9
- LIGHTS Light 6
- LNDRGN Land region 6
- RECTRC 5
- SOUNDG Sounding 4
- BOYSPP Special purpose buoy 2
- BUISGL 2
- FSHFAC 2
- LNDMRK 2
- MAGVAR Magnetic variation 2
- MORFAC 2
- RESARE 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/US4MI1KI.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4MI1KI/1.2/US4MI1KI.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4MI1KI/1.2/US4MI1KI.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4MI1KI/1.2/US4MI1KI.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MI1KI/1.2/US4MI1KI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MI1KI/1.2/US4MI1KI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MI1KI/1.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.2 | Aug 7, 2024 | metadata.json |