NOAA S-57 chart cell
Gulf of America and Mississippi Canyon
US4LA1CP
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 130
- S-57 layers
- 21
- Published
- May 30, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 28.80000° N
- South
- 28.50000° N
- West
- 89.40000° W
- East
- 89.10000° W
- Center
- 28.65000° N, 89.25000° W
- Bounds area
- 285 sq nm
- Feature density
- 0.4566 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.2
- Smallest layer
- 1
- Largest layer
- 76
- Area sq km
- 977
- Features per sq km
- 0.13312
- PIPSOL 76
- OFSPLF 8
- DEPARE Depth area 7
- DEPCNT Depth contour 6
- OBSTRN Obstruction 5
- SOUNDG Sounding 5
- SBDARE Seabed area 4
- M_QUAL Data quality 3
- WRECKS Wreck 3
- SEAARE Sea area 2
- CONZNE 1
- DMPGRD 1
- EXEZNE 1
- FAIRWY Fairway 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MAGVAR Magnetic variation 1
- PILPNT 1
- RTPBCN 1
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/US4LA1CP.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1CP/1.1/US4LA1CP.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1CP/1.1/US4LA1CP.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1CP/1.1/US4LA1CP.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1CP/1.1/US4LA1CP.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1CP/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | May 30, 2025 | metadata.json |