NOAA S-57 chart cell

Gulf Intracoastal Waterway - East Bay to Gulf of America

US4TX1NL

Usage band
Approach · code 4
Current edition
2.3
Features
613
S-57 layers
53
Published
Mar 24, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
29.70000° N
South
29.40000° N
West
94.50000° W
East
94.20000° W
Center
29.55000° N, 94.35000° W
Bounds area
282 sq nm
Feature density
2.1719 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
11.6
Smallest layer
1
Largest layer
71
Area sq km
968
Features per sq km
0.63324
  1. RIVERS River 71
  2. COALNE Coastline 68
  3. LAKARE 53
  4. DEPARE Depth area 45
  5. DEPCNT Depth contour 43
  6. SBDARE Seabed area 42
  7. LNDRGN Land region 37
  8. DYKCON 29
  9. SLCONS Shoreline construction 27
  10. LNDARE Land area 22
  11. M_QUAL Data quality 22
  12. SEAARE Sea area 13
  13. OBSTRN Obstruction 11
  14. OFSPLF 11
  15. DAYMAR 10
  16. LIGHTS Light 10
  17. RETRFL 10
  18. WRECKS Wreck 10
  19. PILPNT 9
  20. BCNLAT Lateral beacon 8

Nearby Chart Cells

Approach usage band

  1. Gulf Intracoastal Waterway - Sabine Bank - Gulf of America US4TX1NM - about 16 nm away
  2. Gulf Intracoastal Waterway - Galveston Bay, East Bay, Trinity Bay to Gulf of America US4TX1NK - about 16 nm away
  3. approaches to Galveston Bay US4TX1ML - about 18 nm away
  4. Gulf Intracoastal Waterway - Sabine Neches Canal, Sabine Lake, and Neches River US4TX1OM - about 24 nm away
  5. Trinity Bay to Lake Anahuac US4TX1OK - about 24 nm away
  6. Gulf of America - Sabine Bank to Heald Bank US4TX1MM - 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 Mar 24, 2026 metadata.json