NOAA S-57 chart cell
Cayo Del Grullo and Alazan Bay
US4TX1GA
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 522
- S-57 layers
- 25
- Published
- May 27, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 27.60000° N
- South
- 27.30000° N
- West
- 97.80000° W
- East
- 97.50000° W
- Center
- 27.45000° N, 97.65000° W
- Bounds area
- 288 sq nm
- Feature density
- 1.8131 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 20.9
- Smallest layer
- 1
- Largest layer
- 133
- Area sq km
- 988
- Features per sq km
- 0.52861
- SLCONS Shoreline construction 133
- COALNE Coastline 113
- SBDARE Seabed area 58
- LNDRGN Land region 43
- DEPARE Depth area 40
- DEPCNT Depth contour 35
- LNDARE Land area 16
- OBSTRN Obstruction 16
- SLOTOP 11
- M_QUAL Data quality 9
- SEAARE Sea area 9
- UWTROC Underwater rock 8
- RIVERS River 6
- DMPGRD 5
- LNDMRK 5
- LAKARE 4
- BUAARE 2
- MAGVAR Magnetic variation 2
- CTNARE Caution area 1
- M_COVR Coverage 1
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/US4TX1GA.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4TX1GA/1.0/US4TX1GA.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4TX1GA/1.0/US4TX1GA.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4TX1GA/1.0/US4TX1GA.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4TX1GA/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | May 27, 2025 | metadata.json |