NOAA S-57 chart cell
Lake Michigan - Calumet River to Chicago Harbor Entrance, IL
US4IL1XY
- Usage band
- Approach · code 4
- Current edition
- 2.3
- Features
- 929
- S-57 layers
- 43
- Published
- Apr 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 42.00000° N
- South
- 41.70000° N
- West
- 87.60000° W
- East
- 87.30000° W
- Center
- 41.85000° N, 87.45000° W
- Bounds area
- 242 sq nm
- Feature density
- 3.8441 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 21.6
- Smallest layer
- 1
- Largest layer
- 250
- Area sq km
- 829
- Features per sq km
- 1.12075
- DEPCNT Depth contour 250
- DEPARE Depth area 244
- SLCONS Shoreline construction 78
- LIGHTS Light 39
- OBSTRN Obstruction 29
- BRIDGE 27
- COALNE Coastline 25
- SBDARE Seabed area 25
- BCNSPP Special purpose beacon 18
- BOYLAT Lateral buoy 16
- SEAARE Sea area 14
- RECTRC 13
- M_QUAL Data quality 12
- SOUNDG Sounding 12
- DAYMAR 11
- WRECKS Wreck 11
- BCNLAT Lateral beacon 10
- CBLSUB 9
- UWTROC Underwater rock 9
- FOGSIG 8
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/US4IL1XY.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4IL1XY/2.3/US4IL1XY.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4IL1XY/2.3/US4IL1XY.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4IL1XY/2.3/US4IL1XY.002
- S-57 update 003 https://charts.openships.ai/noaa/s57/approach/US4IL1XY/2.3/US4IL1XY.003
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4IL1XY/2.3/US4IL1XY.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4IL1XY/2.3/US4IL1XY.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4IL1XY/2.3/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.3 | Apr 22, 2026 | metadata.json |