NOAA S-57 chart cell
Lake Erie - Otter Creek, MI To Ottawa River, OH
US4MI1AH
- Usage band
- Approach · code 4
- Current edition
- 1.2
- Features
- 261
- S-57 layers
- 35
- Published
- Jan 7, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 42.00000° N
- South
- 41.70000° N
- West
- 83.70000° W
- East
- 83.40000° W
- Center
- 41.85000° N, 83.55000° W
- Bounds area
- 242 sq nm
- Feature density
- 1.08 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 7.5
- Smallest layer
- 1
- Largest layer
- 38
- Area sq km
- 829
- Features per sq km
- 0.31487
- DEPCNT Depth contour 38
- DEPARE Depth area 37
- COALNE Coastline 33
- LNDARE Land area 23
- LNDRGN Land region 15
- M_QUAL Data quality 13
- BRIDGE 12
- RIVERS River 12
- LIGHTS Light 11
- OBSTRN Obstruction 8
- SLCONS Shoreline construction 6
- SEAARE Sea area 5
- BCNSPP Special purpose beacon 4
- LNDMRK 4
- SOUNDG Sounding 4
- BUAARE 3
- C_AGGR 3
- CTNARE Caution area 3
- NAVLNE 3
- BCNLAT Lateral beacon 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/US4MI1AH.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4MI1AH/1.2/US4MI1AH.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4MI1AH/1.2/US4MI1AH.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4MI1AH/1.2/US4MI1AH.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MI1AH/1.2/US4MI1AH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MI1AH/1.2/US4MI1AH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MI1AH/1.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.2 | Jan 7, 2026 | metadata.json |