NOAA S-57 chart cell
Gulf Intracoastal Waterway and Bayou Lafourche
US4LA1FL
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 3,505
- S-57 layers
- 46
- Published
- Feb 27, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 90.60000° W
- East
- 90.30000° W
- Center
- 29.55000° N, 90.45000° W
- Bounds area
- 282 sq nm
- Feature density
- 12.4187 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 76.2
- Smallest layer
- 1
- Largest layer
- 1,912
- Area sq km
- 968
- Features per sq km
- 3.6207
- LNDARE Land area 1,912
- COALNE Coastline 483
- LNDRGN Land region 392
- RIVERS River 88
- DEPARE Depth area 75
- SLCONS Shoreline construction 63
- LAKARE 57
- CANALS 49
- M_QUAL Data quality 46
- CTNARE Caution area 44
- BRIDGE 35
- SEAARE Sea area 34
- DEPCNT Depth contour 33
- VEGATN 27
- BUAARE 18
- PIPARE 15
- CBLOHD 14
- LIGHTS Light 12
- SILTNK 12
- DYKCON 10
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/US4LA1FL.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1FL/1.1/US4LA1FL.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1FL/1.1/US4LA1FL.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FL/1.1/US4LA1FL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FL/1.1/US4LA1FL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FL/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Feb 27, 2026 | metadata.json |