NOAA S-57 chart cell
Lake Huron - False Presque Isle and Alpena, MI
US4MI1LH
- Usage band
- Approach · code 4
- Current edition
- 4.0
- Features
- 313
- S-57 layers
- 43
- Published
- Feb 25, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 45.30000° N
- South
- 45.00000° N
- West
- 83.70000° W
- East
- 83.40000° W
- Center
- 45.15000° N, 83.55000° W
- Bounds area
- 229 sq nm
- Feature density
- 1.3679 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 7.3
- Smallest layer
- 1
- Largest layer
- 58
- Area sq km
- 785
- Features per sq km
- 0.39883
- DEPARE Depth area 58
- DEPCNT Depth contour 54
- M_QUAL Data quality 26
- COALNE Coastline 20
- LNDRGN Land region 17
- LIGHTS Light 13
- OBSTRN Obstruction 11
- LNDMRK 10
- RESARE 8
- UWTROC Underwater rock 8
- BUISGL 7
- SEAARE Sea area 7
- SLCONS Shoreline construction 7
- BCNSPP Special purpose beacon 6
- BRIDGE 5
- RIVERS River 5
- BUAARE 4
- DAYMAR 4
- SLOTOP 4
- BOYLAT Lateral buoy 3
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/US4MI1LH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MI1LH/4.0/US4MI1LH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MI1LH/4.0/US4MI1LH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MI1LH/4.0/US4MI1LH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MI1LH/4.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 4.0 | Feb 25, 2025 | metadata.json |