NOAA S-57 chart cell

Gulf of America

US4LA1EH

Usage band
Approach · code 4
Current edition
1.1
Features
625
S-57 layers
27
Published
Mar 26, 2025
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
29.40000° N
South
29.10000° N
West
91.80000° W
East
91.50000° W
Center
29.25000° N, 91.65000° W
Bounds area
283 sq nm
Feature density
2.2079 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
23.1
Smallest layer
1
Largest layer
298
Area sq km
971
Features per sq km
0.64373
  1. PIPSOL 298
  2. OFSPLF 124
  3. SBDARE Seabed area 63
  4. SOUNDG Sounding 29
  5. OBSTRN Obstruction 24
  6. M_QUAL Data quality 18
  7. WRECKS Wreck 14
  8. BOYLAT Lateral buoy 10
  9. DEPCNT Depth contour 6
  10. DEPARE Depth area 5
  11. DMPGRD 5
  12. LIGHTS Light 5
  13. CBLSUB 3
  14. MAGVAR Magnetic variation 3
  15. PILPNT 3
  16. SEAARE Sea area 3
  17. FAIRWY Fairway 2
  18. ADMARE 1
  19. CONZNE 1
  20. CTNARE Caution area 1

Nearby Chart Cells

Approach usage band

  1. Gulf of America US4LA1EG - about 16 nm away
  2. Gulf of America to Atchafalaya Bay US4LA1EI - about 16 nm away
  3. East Cote Blanche Bay and Atchafalaya Bay US4LA1FH - about 18 nm away
  4. Gulf of America US4LA1DH - about 18 nm away
  5. Gulf of America to Southwest Pass, Vermilion Bay, and West Cote Blanche Bay US4LA1FG - about 24 nm away
  6. Atchafalaya Bay to Lower Atchafalaya River US4LA1FI - 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
1.1 Mar 26, 2025 metadata.json