NOAA S-57 chart cell
East Cote Blanche Bay and Atchafalaya Bay
US4LA1FH
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 788
- S-57 layers
- 40
- Published
- Mar 26, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 91.80000° W
- East
- 91.50000° W
- Center
- 29.55000° N, 91.65000° W
- Bounds area
- 282 sq nm
- Feature density
- 2.792 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 19.7
- Smallest layer
- 1
- Largest layer
- 195
- Area sq km
- 968
- Features per sq km
- 0.81401
- OFSPLF 195
- SBDARE Seabed area 120
- DEPARE Depth area 74
- DEPCNT Depth contour 69
- LNDRGN Land region 59
- COALNE Coastline 32
- PILPNT 28
- SLCONS Shoreline construction 28
- OBSTRN Obstruction 27
- PIPSOL 14
- SEAARE Sea area 13
- LNDARE Land area 12
- RIVERS River 12
- LIGHTS Light 11
- BCNSPP Special purpose beacon 10
- DAYMAR 10
- M_QUAL Data quality 10
- BCNLAT Lateral beacon 9
- WRECKS Wreck 7
- LNDMRK 5
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/US4LA1FH.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1FH/1.1/US4LA1FH.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1FH/1.1/US4LA1FH.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FH/1.1/US4LA1FH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FH/1.1/US4LA1FH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FH/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Mar 26, 2025 | metadata.json |