NOAA S-57 chart cell
Lake Michigan - Algoma and Kewaunee, WI
US4WI1IQ
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 389
- S-57 layers
- 36
- Published
- Aug 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 44.70000° N
- South
- 44.40000° N
- West
- 87.60000° W
- East
- 87.30000° W
- Center
- 44.55000° N, 87.45000° W
- Bounds area
- 231 sq nm
- Feature density
- 1.6825 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 10.8
- Smallest layer
- 1
- Largest layer
- 115
- Area sq km
- 793
- Features per sq km
- 0.49053
- UWTROC Underwater rock 115
- COALNE Coastline 38
- DEPCNT Depth contour 29
- DEPARE Depth area 28
- OBSTRN Obstruction 20
- LNDARE Land area 13
- LNDRGN Land region 13
- SLCONS Shoreline construction 13
- LNDMRK 12
- BUISGL 10
- RIVERS River 10
- SILTNK 9
- LIGHTS Light 8
- BRIDGE 7
- BUAARE 6
- CBLOHD 6
- M_QUAL Data quality 6
- SBDARE Seabed area 6
- CTRPNT 5
- FSHFAC 4
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/US4WI1IQ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4WI1IQ/2.0/US4WI1IQ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4WI1IQ/2.0/US4WI1IQ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4WI1IQ/2.0/US4WI1IQ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4WI1IQ/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Aug 15, 2025 | metadata.json |