NOAA S-57 chart cell
Gulf of America
US4LA1FR
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 347
- S-57 layers
- 24
- Published
- May 9, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 88.80000° W
- East
- 88.50000° W
- Center
- 29.55000° N, 88.65000° W
- Bounds area
- 282 sq nm
- Feature density
- 1.2295 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 14.5
- Smallest layer
- 1
- Largest layer
- 213
- Area sq km
- 968
- Features per sq km
- 0.35845
- PIPSOL 213
- OFSPLF 33
- SBDARE Seabed area 30
- SOUNDG Sounding 18
- M_QUAL Data quality 14
- DEPCNT Depth contour 9
- DEPARE Depth area 6
- OBSTRN Obstruction 4
- FAIRWY Fairway 2
- LIGHTS Light 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- BOYLAT Lateral buoy 1
- BOYSPP Special purpose buoy 1
- CONZNE 1
- CTNARE Caution area 1
- EXEZNE 1
- FOGSIG 1
- M_COVR Coverage 1
- M_NSYS 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/US4LA1FR.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1FR/3.0/US4LA1FR.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FR/3.0/US4LA1FR.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FR/3.0/US4LA1FR.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FR/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | May 9, 2025 | metadata.json |