NOAA S-57 chart cell
Lake Michigan - Lake Center Offshore of Milwaukee, WI
US4WI1DR
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 21
- S-57 layers
- 11
- Published
- Aug 14, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 43.20000° N
- South
- 42.90000° N
- West
- 87.30000° W
- East
- 87.00000° W
- Center
- 43.05000° N, 87.15000° W
- Bounds area
- 237 sq nm
- Feature density
- 0.0886 / sq nm
Chart Statistics
11 largest layers shown
- Average features per layer
- 1.9
- Smallest layer
- 1
- Largest layer
- 7
- Area sq km
- 813
- Features per sq km
- 0.02582
- RECTRC 7
- SOUNDG Sounding 3
- M_NPUB 2
- MAGVAR Magnetic variation 2
- DEPARE Depth area 1
- FERYRT 1
- M_COVR Coverage 1
- M_NSYS 1
- M_QUAL Data quality 1
- RESARE 1
- SEAARE Sea area 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/US4WI1DR.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4WI1DR/2.0/US4WI1DR.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4WI1DR/2.0/US4WI1DR.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4WI1DR/2.0/US4WI1DR.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4WI1DR/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Aug 14, 2025 | metadata.json |