NOAA S-57 chart cell

Lake Michigan - Two Rivers, WI

US4WI1HQ

Usage band
Approach · code 4
Current edition
1.1
Features
180
S-57 layers
37
Published
Aug 7, 2024
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
44.40000° N
South
44.10000° N
West
87.60000° W
East
87.30000° W
Center
44.25000° N, 87.45000° W
Bounds area
232 sq nm
Feature density
0.7745 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
4.9
Smallest layer
1
Largest layer
18
Area sq km
797
Features per sq km
0.22582
  1. DEPARE Depth area 18
  2. DEPCNT Depth contour 18
  3. OBSTRN Obstruction 18
  4. LIGHTS Light 15
  5. SBDARE Seabed area 8
  6. UWTROC Underwater rock 8
  7. BOYSPP Special purpose buoy 7
  8. FSHFAC 6
  9. RIVERS River 6
  10. SLCONS Shoreline construction 6
  11. WRECKS Wreck 6
  12. LNDMRK 5
  13. M_QUAL Data quality 5
  14. RECTRC 5
  15. BRIDGE 4
  16. COALNE Coastline 4
  17. LNDRGN Land region 4
  18. MORFAC 4
  19. RESARE 4
  20. BUAARE 3

Nearby Chart Cells

Approach usage band

  1. Lake Michigan - Offshore of Point Beach, WI US4WI1HR - about 13 nm away
  2. Lake Michigan - North Manitowoc, WI US4WI1HP - about 13 nm away
  3. Lake Michigan - Algoma and Kewaunee, WI US4WI1IQ - about 18 nm away
  4. Lake Michigan - Offshore of Manitowoc, WI US4WI1GQ - about 18 nm away
  5. Lake Michigan - Offshore of Algoma, WI US4WI1IR - about 22 nm away
  6. Green Bay - Red River to Point Sable, WI US4WI1IP - about 22 nm away

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.

Editions

Edition Published Metadata
1.1 Aug 7, 2024 metadata.json