NOAA S-57 chart cell

Gulf of America to Calcasieu Pass and Calcasieu Lake

US4LA1GB

Usage band
Approach · code 4
Current edition
3.3
Features
989
S-57 layers
51
Published
Apr 15, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
30.00000° N
South
29.70000° N
West
93.60000° W
East
93.30000° W
Center
29.85000° N, 93.45000° W
Bounds area
281 sq nm
Feature density
3.5146 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
19.4
Smallest layer
1
Largest layer
133
Area sq km
965
Features per sq km
1.0247
  1. SLCONS Shoreline construction 133
  2. COALNE Coastline 102
  3. LIGHTS Light 64
  4. DAYMAR 61
  5. SBDARE Seabed area 52
  6. DEPARE Depth area 51
  7. M_QUAL Data quality 50
  8. DEPCNT Depth contour 49
  9. LNDRGN Land region 42
  10. BCNSPP Special purpose beacon 40
  11. OBSTRN Obstruction 34
  12. BCNLAT Lateral beacon 32
  13. PILPNT 27
  14. WRECKS Wreck 27
  15. SOUNDG Sounding 19
  16. PIPSOL 18
  17. LNDARE Land area 17
  18. CANALS 16
  19. DMPGRD 15
  20. SEAARE Sea area 10

Nearby Chart Cells

Approach usage band

  1. Gulf Intracoastal Waterway - Gulf of America and Calcasieu Lake, Mermentau River US4LA1GC - about 16 nm away
  2. Gulf Intracoastal Waterway - Sabine Lake and Sabine Passage US4LA1GA - about 16 nm away
  3. Gulf Intracoastal Waterway - Calcasieu River and Calcasieu Lake US4LA1HB - about 18 nm away
  4. Approaches to Calcasieu Pass - Sabine Bank US4LA1FB - about 18 nm away
  5. Gulf Intracoastal Waterway - Calcasieu River and Calcasieu Lake US4LA1HC - about 24 nm away
  6. Gulf Intracoastal Waterway - Sabine River and Cow Bayou US4TX1PN - 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
3.3 Apr 15, 2026 metadata.json