NOAA S-57 chart cell
Mississippi River, Manchac Bend, and Baton Rouge
US4LA1IJ
- Usage band
- Approach · code 4
- Current edition
- 3.3
- Features
- 520
- S-57 layers
- 45
- Published
- May 26, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.60000° N
- South
- 30.30000° N
- West
- 91.20000° W
- East
- 90.90000° W
- Center
- 30.45000° N, 91.05000° W
- Bounds area
- 280 sq nm
- Feature density
- 1.8592 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 11.6
- Smallest layer
- 1
- Largest layer
- 58
- Area sq km
- 959
- Features per sq km
- 0.54206
- DEPCNT Depth contour 58
- DEPARE Depth area 55
- LIGHTS Light 39
- BUISGL 36
- SLCONS Shoreline construction 36
- OBSTRN Obstruction 35
- BCNLAT Lateral beacon 29
- SOUNDG Sounding 28
- COALNE Coastline 25
- ROADWY 24
- DAYMAR 13
- LAKARE 12
- MORFAC 10
- RESARE 10
- SILTNK 10
- BCNSPP Special purpose beacon 8
- LNDRGN Land region 8
- LNDMRK 7
- PIPARE 7
- SEAARE Sea area 7
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/US4LA1IJ.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1IJ/3.3/US4LA1IJ.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1IJ/3.3/US4LA1IJ.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4LA1IJ/3.3/US4LA1IJ.002
- S-57 update 003 https://charts.openships.ai/noaa/s57/approach/US4LA1IJ/3.3/US4LA1IJ.003
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1IJ/3.3/US4LA1IJ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1IJ/3.3/US4LA1IJ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1IJ/3.3/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.3 | May 26, 2026 | metadata.json |