NOAA S-57 chart cell

Mississippi River - Head of Passes

US4LA1EP

Usage band
Approach · code 4
Current edition
3.7
Features
4,597
S-57 layers
52
Published
May 5, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
29.40000° N
South
29.10000° N
West
89.40000° W
East
89.10000° W
Center
29.25000° N, 89.25000° W
Bounds area
283 sq nm
Feature density
16.2398 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
88.4
Smallest layer
1
Largest layer
878
Area sq km
971
Features per sq km
4.73476
  1. LNDARE Land area 878
  2. RIVERS River 703
  3. COALNE Coastline 631
  4. LNDRGN Land region 446
  5. DEPCNT Depth contour 245
  6. DEPARE Depth area 242
  7. LAKARE 211
  8. SLCONS Shoreline construction 199
  9. SEAARE Sea area 115
  10. OFSPLF 89
  11. DAYMAR 84
  12. OBSTRN Obstruction 82
  13. LIGHTS Light 77
  14. PIPSOL 74
  15. M_QUAL Data quality 70
  16. BCNLAT Lateral beacon 67
  17. PILPNT 53
  18. SOUNDG Sounding 40
  19. BCNSPP Special purpose beacon 34
  20. CTNARE Caution area 34

Nearby Chart Cells

Approach usage band

  1. Gulf of America to Blind Bay US4LA1EQ - about 16 nm away
  2. Louisiana US4LA1EO - about 16 nm away
  3. Gulf of America to Breton Sound and Chandeleur Sound US4LA1FP - about 18 nm away
  4. Gulf of America to East Bay to Southwest Pass and South Pass US4LA1DP - about 18 nm away
  5. Gulf of America to Chandeleur Sound US4LA1FQ - about 24 nm away
  6. Louisiana US4LA1FO - about 24 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
3.7 May 5, 2026 metadata.json