NOAA S-57 chart cell

Gulf Intracoastal Waterway - Galveston Bay, West Bay to Gulf of America

US4TX1MJ

Usage band
Approach · code 4
Current edition
4.6
Features
4,415
S-57 layers
61
Published
May 11, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
29.40000° N
South
29.10000° N
West
95.10000° W
East
94.80000° W
Center
29.25000° N, 94.95000° W
Bounds area
283 sq nm
Feature density
15.5968 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
72.4
Smallest layer
1
Largest layer
723
Area sq km
971
Features per sq km
4.54731
  1. SLCONS Shoreline construction 723
  2. DEPCNT Depth contour 475
  3. DEPARE Depth area 464
  4. COALNE Coastline 390
  5. PILPNT 271
  6. OBSTRN Obstruction 226
  7. LNDARE Land area 202
  8. SBDARE Seabed area 133
  9. LNDRGN Land region 129
  10. RIVERS River 129
  11. DAYMAR 124
  12. M_QUAL Data quality 122
  13. LIGHTS Light 82
  14. BCNLAT Lateral beacon 76
  15. BCNSPP Special purpose beacon 72
  16. RETRFL 61
  17. BOYLAT Lateral buoy 60
  18. PYLONS 58
  19. SEAARE Sea area 46
  20. UWTROC Underwater rock 43

Nearby Chart Cells

Approach usage band

  1. Approaches to Galveston Bay US4TX1MK - about 16 nm away
  2. Gulf Intracoastal Waterway - West Bay and Chocolate Bay US4TX1MI - about 16 nm away
  3. Galveston Bay and Trinity Bay US4TX1NJ - about 18 nm away
  4. Gulf of America to San Luis Pass US4TX1LJ - about 18 nm away
  5. Gulf Intracoastal Waterway - Galveston Bay, East Bay, Trinity Bay to Gulf of America US4TX1NK - about 24 nm away
  6. Texas - Clear Creek US4TX1NI - 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
4.6 May 11, 2026 metadata.json