NOAA S-57 chart cell
Gulf of America
US4LA1DH
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 464
- S-57 layers
- 19
- Published
- Mar 26, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.10000° N
- South
- 28.80000° N
- West
- 91.80000° W
- East
- 91.50000° W
- Center
- 28.95000° N, 91.65000° W
- Bounds area
- 284 sq nm
- Feature density
- 1.6344 / sq nm
Chart Statistics
19 largest layers shown
- Average features per layer
- 24.4
- Smallest layer
- 1
- Largest layer
- 289
- Area sq km
- 974
- Features per sq km
- 0.47651
- PIPSOL 289
- OFSPLF 46
- OBSTRN Obstruction 34
- SBDARE Seabed area 33
- M_QUAL Data quality 17
- SOUNDG Sounding 14
- DEPARE Depth area 6
- DEPCNT Depth contour 5
- WRECKS Wreck 5
- BOYSPP Special purpose buoy 2
- CBLSUB 2
- LIGHTS Light 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- SEAARE Sea area 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/US4LA1DH.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1DH/1.1/US4LA1DH.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1DH/1.1/US4LA1DH.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1DH/1.1/US4LA1DH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1DH/1.1/US4LA1DH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1DH/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Mar 26, 2025 | metadata.json |