NOAA S-57 chart cell
Gulf of America to Southwest Pass and West Bay
US4LA1DO
- Usage band
- Approach · code 4
- Current edition
- 3.2
- Features
- 785
- S-57 layers
- 50
- Published
- Dec 4, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.10000° N
- South
- 28.80000° N
- West
- 89.70000° W
- East
- 89.40000° W
- Center
- 28.95000° N, 89.55000° W
- Bounds area
- 284 sq nm
- Feature density
- 2.7651 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 15.7
- Smallest layer
- 1
- Largest layer
- 187
- Area sq km
- 974
- Features per sq km
- 0.80617
- PIPSOL 187
- SLCONS Shoreline construction 86
- OFSPLF 71
- SBDARE Seabed area 59
- OBSTRN Obstruction 45
- DEPARE Depth area 36
- SOUNDG Sounding 36
- DEPCNT Depth contour 35
- LIGHTS Light 31
- COALNE Coastline 25
- M_QUAL Data quality 22
- DAYMAR 17
- BCNSPP Special purpose beacon 13
- LNDARE Land area 13
- PILPNT 13
- WRECKS Wreck 10
- MORFAC 7
- C_AGGR 6
- DMPGRD 6
- LNDRGN Land region 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/US4LA1DO.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1DO/3.2/US4LA1DO.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1DO/3.2/US4LA1DO.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4LA1DO/3.2/US4LA1DO.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1DO/3.2/US4LA1DO.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1DO/3.2/US4LA1DO.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1DO/3.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.2 | Dec 4, 2025 | metadata.json |