NOAA S-57 chart cell
Gulf of America
US4LA1DR
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 161
- S-57 layers
- 19
- Published
- May 8, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.10000° N
- South
- 28.80000° N
- West
- 88.80000° W
- East
- 88.50000° W
- Center
- 28.95000° N, 88.65000° W
- Bounds area
- 284 sq nm
- Feature density
- 0.5671 / sq nm
Chart Statistics
19 largest layers shown
- Average features per layer
- 8.5
- Smallest layer
- 1
- Largest layer
- 106
- Area sq km
- 974
- Features per sq km
- 0.16534
- PIPSOL 106
- DEPCNT Depth contour 12
- DEPARE Depth area 8
- OFSPLF 7
- OBSTRN Obstruction 5
- SBDARE Seabed area 4
- MAGVAR Magnetic variation 3
- SOUNDG Sounding 3
- BOYSPP Special purpose buoy 2
- M_NPUB 2
- CONZNE 1
- CTNARE Caution area 1
- EXEZNE 1
- FAIRWY Fairway 1
- M_COVR Coverage 1
- M_NSYS 1
- M_QUAL Data quality 1
- SEAARE Sea area 1
- TESARE 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/US4LA1DR.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1DR/2.0/US4LA1DR.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1DR/2.0/US4LA1DR.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1DR/2.0/US4LA1DR.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1DR/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | May 8, 2025 | metadata.json |