NOAA S-57 chart cell

Louisiana

US4LA1GN

Usage band
Approach · code 4
Current edition
2.3
Features
2,110
S-57 layers
57
Published
May 5, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
30.00000° N
South
29.70000° N
West
90.00000° W
East
89.70000° W
Center
29.85000° N, 89.85000° W
Bounds area
281 sq nm
Feature density
7.4984 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
37
Smallest layer
1
Largest layer
371
Area sq km
965
Features per sq km
2.18617
  1. COALNE Coastline 371
  2. LNDRGN Land region 294
  3. LNDARE Land area 291
  4. DEPARE Depth area 132
  5. SLCONS Shoreline construction 108
  6. DEPCNT Depth contour 104
  7. SEAARE Sea area 63
  8. CANALS 61
  9. RIVERS River 58
  10. LIGHTS Light 54
  11. DYKCON 49
  12. M_QUAL Data quality 46
  13. BCNLAT Lateral beacon 43
  14. OBSTRN Obstruction 43
  15. LAKARE 41
  16. MORFAC 41
  17. DAYMAR 28
  18. BUAARE 24
  19. SOUNDG Sounding 22
  20. WRECKS Wreck 22

Nearby Chart Cells

Approach usage band

  1. Mississippi River - Gulf Outlet and Lake Borgne US4LA1GO - about 16 nm away
  2. Mississippi River and Gulf Intracoastal Waterway US4LA1GM - about 16 nm away
  3. Gulf Intracoastal Waterway - Lake Borgne and Lake Pontchartrain US4LA1HO - about 18 nm away
  4. Mississippi River and Barataria Bay US4LA1FN - about 18 nm away
  5. Gulf Intracoastal Waterway - Pearl River to Lake Borgne US4LA1HP - about 24 nm away
  6. Lake Pontchartrain US4LA1HM - 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
2.3 May 5, 2026 metadata.json