NOAA S-57 chart cell

Timbalier Bay - Gulf of America

US4LA1DM

Usage band
Approach · code 4
Current edition
1.4
Features
1,205
S-57 layers
44
Published
Jun 1, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
29.10000° N
South
28.80000° N
West
90.30000° W
East
90.00000° W
Center
28.95000° N, 90.15000° W
Bounds area
284 sq nm
Feature density
4.2445 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
27.4
Smallest layer
1
Largest layer
517
Area sq km
974
Features per sq km
1.2375
  1. PIPSOL 517
  2. OFSPLF 177
  3. OBSTRN Obstruction 107
  4. SBDARE Seabed area 95
  5. DEPARE Depth area 38
  6. COALNE Coastline 32
  7. DEPCNT Depth contour 29
  8. LNDARE Land area 23
  9. M_QUAL Data quality 23
  10. SOUNDG Sounding 17
  11. WRECKS Wreck 16
  12. LIGHTS Light 15
  13. PILPNT 14
  14. SLCONS Shoreline construction 14
  15. MORFAC 12
  16. LNDRGN Land region 11
  17. RIVERS River 10
  18. RESARE 8
  19. MAGVAR Magnetic variation 5
  20. SEAARE Sea area 5

Nearby Chart Cells

Approach usage band

  1. Terrebonne Bay and Timbalier Bay - Gulf of America US4LA1DL - about 16 nm away
  2. Gulf of America US4LA1DN - about 16 nm away
  3. Bassa Bassa Bay and Timbalier Bay - Gulf of America US4LA1EM - about 18 nm away
  4. Gulf of America US4LA1CM - about 18 nm away
  5. Catfish Lake - Terrebonne Bay and Timbalier Bay US4LA1EL - about 24 nm away
  6. Gulf of America to Barataria Bay, Lake Grande Ecaille, and Lake Washington US4LA1EN - 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
1.4 Jun 1, 2026 metadata.json