NOAA S-57 chart cell

Mississippi River and Lake Salvador

US4LA1GL

Usage band
Approach · code 4
Current edition
2.5
Features
626
S-57 layers
49
Published
Jun 4, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

Loading map
North
30.00000° N
South
29.70000° N
West
90.60000° W
East
90.30000° W
Center
29.85000° N, 90.45000° W
Bounds area
281 sq nm
Feature density
2.2246 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
12.8
Smallest layer
1
Largest layer
62
Area sq km
965
Features per sq km
0.6486
  1. SLCONS Shoreline construction 62
  2. LIGHTS Light 59
  3. DEPCNT Depth contour 57
  4. MORFAC 50
  5. BCNLAT Lateral beacon 47
  6. COALNE Coastline 45
  7. DEPARE Depth area 40
  8. SILTNK 35
  9. LNDRGN Land region 27
  10. BUAARE 15
  11. BUISGL 12
  12. RESARE 12
  13. CONVYR 11
  14. BCNSPP Special purpose beacon 9
  15. DAYMAR 9
  16. NEWOBJ 9
  17. RIVERS River 9
  18. DYKCON 8
  19. BRIDGE 7
  20. FOGSIG 7

Nearby Chart Cells

Approach usage band

  1. Mississippi River and Gulf Intracoastal Waterway US4LA1GM - about 16 nm away
  2. Bayou Lafourche US4LA1GK - about 16 nm away
  3. Mississippi River, Lake Pontchartrain, and Lake Maurepas US4LA1HL - about 18 nm away
  4. Gulf Intracoastal Waterway and Bayou Lafourche US4LA1FL - about 18 nm away
  5. Lake Pontchartrain US4LA1HM - about 24 nm away
  6. Mississippi River and Blind River US4LA1HK - 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
2.5 Jun 4, 2026 metadata.json