NOAA S-57 chart cell
Lake Michigan - Port Washington, WI
US4WI1EP
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 176
- S-57 layers
- 33
- Published
- Aug 7, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 43.50000° N
- South
- 43.20000° N
- West
- 87.90000° W
- East
- 87.60000° W
- Center
- 43.35000° N, 87.75000° W
- Bounds area
- 236 sq nm
- Feature density
- 0.746 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 5.3
- Smallest layer
- 1
- Largest layer
- 38
- Area sq km
- 809
- Features per sq km
- 0.2175
- OBSTRN Obstruction 38
- DEPARE Depth area 22
- DEPCNT Depth contour 19
- SLCONS Shoreline construction 14
- LIGHTS Light 11
- LNDMRK 10
- SBDARE Seabed area 7
- COALNE Coastline 5
- PONTON 4
- RECTRC 4
- SILTNK 4
- WRECKS Wreck 4
- MAGVAR Magnetic variation 3
- MORFAC 3
- SOUNDG Sounding 3
- ADMARE 2
- BOYSPP Special purpose buoy 2
- BUAARE 2
- LNDARE Land area 2
- M_QUAL Data quality 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/US4WI1EP.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4WI1EP/1.1/US4WI1EP.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4WI1EP/1.1/US4WI1EP.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4WI1EP/1.1/US4WI1EP.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4WI1EP/1.1/US4WI1EP.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4WI1EP/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Aug 7, 2024 | metadata.json |