NOAA S-57 chart cell
Gulf of America and Freshwater Bayou Canal
US4LA1FF
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 733
- S-57 layers
- 38
- Published
- Mar 26, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 92.40000° W
- East
- 92.10000° W
- Center
- 29.55000° N, 92.25000° W
- Bounds area
- 282 sq nm
- Feature density
- 2.5971 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 19.3
- Smallest layer
- 1
- Largest layer
- 243
- Area sq km
- 968
- Features per sq km
- 0.7572
- PIPSOL 243
- COALNE Coastline 56
- DRGARE 46
- DEPARE Depth area 34
- OFSPLF 33
- SBDARE Seabed area 32
- LNDRGN Land region 30
- DEPCNT Depth contour 28
- DAYMAR 25
- LIGHTS Light 23
- SLCONS Shoreline construction 21
- M_QUAL Data quality 18
- BCNSPP Special purpose beacon 16
- BCNLAT Lateral beacon 15
- CANALS 13
- SEAARE Sea area 13
- OBSTRN Obstruction 12
- RIVERS River 11
- PILPNT 9
- LAKARE 8
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/US4LA1FF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1FF/2.0/US4LA1FF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FF/2.0/US4LA1FF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FF/2.0/US4LA1FF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FF/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Mar 26, 2026 | metadata.json |