NOAA S-57 chart cell
Gulf Intracoastal Waterway - Southern Laguna Madre including Port Isabel and Port Brownsville
US4TX1AB
- Usage band
- Approach · code 4
- Current edition
- 2.1
- Features
- 778
- S-57 layers
- 49
- Published
- Jun 3, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 26.10000° N
- South
- 25.80000° N
- West
- 97.50000° W
- East
- 97.20000° W
- Center
- 25.95000° N, 97.35000° W
- Bounds area
- 292 sq nm
- Feature density
- 2.6669 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 15.9
- Smallest layer
- 1
- Largest layer
- 146
- Area sq km
- 1,001
- Features per sq km
- 0.77754
- SLCONS Shoreline construction 146
- COALNE Coastline 62
- LIGHTS Light 58
- DAYMAR 45
- BCNLAT Lateral beacon 37
- LNDRGN Land region 35
- PILPNT 35
- RETRFL 32
- DYKCON 30
- M_QUAL Data quality 29
- DEPARE Depth area 28
- BCNSPP Special purpose beacon 23
- BUISGL 23
- OBSTRN Obstruction 18
- LAKARE 17
- RIVERS River 13
- CANALS 11
- DEPCNT Depth contour 11
- LNDARE Land area 11
- BOYLAT Lateral buoy 9
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/US4TX1AB.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4TX1AB/2.1/US4TX1AB.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4TX1AB/2.1/US4TX1AB.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4TX1AB/2.1/US4TX1AB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4TX1AB/2.1/US4TX1AB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4TX1AB/2.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.1 | Jun 3, 2026 | metadata.json |