NOAA S-57 chart cell
Lake Michigan - Little Calumet River, IL
US4IL1WX
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 15
- S-57 layers
- 12
- Published
- Jul 18, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 41.70000° N
- South
- 41.40000° N
- West
- 87.90000° W
- East
- 87.60000° W
- Center
- 41.55000° N, 87.75000° W
- Bounds area
- 243 sq nm
- Feature density
- 0.0618 / sq nm
Chart Statistics
12 largest layers shown
- Average features per layer
- 1.3
- Smallest layer
- 1
- Largest layer
- 2
- Area sq km
- 833
- Features per sq km
- 0.01801
- MAGVAR Magnetic variation 2
- RIVERS River 2
- SEAARE Sea area 2
- BUAARE 1
- COALNE Coastline 1
- CTNARE Caution area 1
- DEPARE Depth area 1
- LNDARE Land area 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- M_QUAL Data quality 1
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/US4IL1WX.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4IL1WX/2.0/US4IL1WX.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4IL1WX/2.0/US4IL1WX.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4IL1WX/2.0/US4IL1WX.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4IL1WX/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Jul 18, 2025 | metadata.json |