NOAA S-57 chart cell

Lake Michigan - Whitefish Bay and Milwaukee Bay, WI

US4WI1DP

Usage band
Approach · code 4
Current edition
1.4
Features
364
S-57 layers
41
Published
Dec 8, 2025
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
43.20000° N
South
42.90000° N
West
87.90000° W
East
87.60000° W
Center
43.05000° N, 87.75000° W
Bounds area
237 sq nm
Feature density
1.5353 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
8.9
Smallest layer
1
Largest layer
76
Area sq km
813
Features per sq km
0.44763
  1. SLCONS Shoreline construction 76
  2. DEPCNT Depth contour 36
  3. DEPARE Depth area 33
  4. COALNE Coastline 27
  5. OBSTRN Obstruction 27
  6. LIGHTS Light 24
  7. PIPSOL 13
  8. M_QUAL Data quality 10
  9. LNDARE Land area 9
  10. PONTON 9
  11. BUAARE 8
  12. LNDMRK 8
  13. SBDARE Seabed area 6
  14. SEAARE Sea area 6
  15. UWTROC Underwater rock 6
  16. ADMARE 5
  17. DAYMAR 5
  18. RECTRC 5
  19. WRECKS Wreck 5
  20. BCNLAT Lateral beacon 4

Nearby Chart Cells

Approach usage band

  1. Lake Michigan - Milwaukee River, WI US4WI1DO - about 13 nm away
  2. Lake Michigan - Offshore of Milwaukee, WI US4WI1DQ - about 13 nm away
  3. Lake Michigan - Racine, WI US4WI1CP - about 18 nm away
  4. Lake Michigan - Port Washington, WI US4WI1EP - about 18 nm away
  5. Lake Michigan - Offshore of Port Washington, WI US4WI1EQ - about 22 nm away
  6. Lake Michigan - Upper Milwaukee River, WI US4WI1EO - 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
1.4 Dec 8, 2025 metadata.json