NOAA S-57 chart cell
Gulf of America to Atchafalaya Bay
US4LA1EI
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 738
- S-57 layers
- 37
- Published
- Jun 5, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.40000° N
- South
- 29.10000° N
- West
- 91.50000° W
- East
- 91.20000° W
- Center
- 29.25000° N, 91.35000° W
- Bounds area
- 283 sq nm
- Feature density
- 2.6071 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 19.9
- Smallest layer
- 1
- Largest layer
- 96
- Area sq km
- 971
- Features per sq km
- 0.76012
- PIPSOL 96
- SBDARE Seabed area 88
- DEPARE Depth area 70
- DEPCNT Depth contour 66
- OFSPLF 56
- COALNE Coastline 40
- LNDRGN Land region 31
- LIGHTS Light 27
- WRECKS Wreck 27
- M_QUAL Data quality 26
- SOUNDG Sounding 26
- DAYMAR 25
- LNDARE Land area 24
- SEAARE Sea area 22
- OBSTRN Obstruction 21
- BCNLAT Lateral beacon 20
- BCNSPP Special purpose beacon 8
- CTNARE Caution area 8
- DMPGRD 8
- BOYLAT Lateral buoy 6
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/US4LA1EI.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1EI/3.0/US4LA1EI.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1EI/3.0/US4LA1EI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1EI/3.0/US4LA1EI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1EI/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | Jun 5, 2025 | metadata.json |