NOAA S-57 chart cell
Gulf Intracoastal Waterway - West Bay and Chocolate Bay
US4TX1MI
- Usage band
- Approach · code 4
- Current edition
- 1.2
- Features
- 928
- S-57 layers
- 47
- Published
- Jul 28, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.40000° N
- South
- 29.10000° N
- West
- 95.40000° W
- East
- 95.10000° W
- Center
- 29.25000° N, 95.25000° W
- Bounds area
- 283 sq nm
- Feature density
- 3.2783 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 19.7
- Smallest layer
- 1
- Largest layer
- 119
- Area sq km
- 971
- Features per sq km
- 0.95581
- COALNE Coastline 119
- DEPARE Depth area 90
- DEPCNT Depth contour 86
- LNDRGN Land region 53
- LNDARE Land area 45
- PILPNT 41
- LIGHTS Light 40
- SLCONS Shoreline construction 40
- RIVERS River 36
- M_QUAL Data quality 35
- OBSTRN Obstruction 34
- BOYLAT Lateral buoy 32
- SBDARE Seabed area 30
- DAYMAR 28
- BCNLAT Lateral beacon 27
- DYKCON 22
- SEAARE Sea area 19
- RETRFL 17
- CTNARE Caution area 16
- OFSPLF 13
Nearby Chart Cells
Approach usage band
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.
- Original NOAA ZIP archive https://www.charts.noaa.gov/ENCs/US4TX1MI.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4TX1MI/1.2/US4TX1MI.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4TX1MI/1.2/US4TX1MI.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4TX1MI/1.2/US4TX1MI.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4TX1MI/1.2/US4TX1MI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4TX1MI/1.2/US4TX1MI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4TX1MI/1.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.2 | Jul 28, 2025 | metadata.json |