NOAA S-57 chart cell
Gulf Intracoastal Waterway - Vermilion Bay including Acadiana Navigation Channel
US4LA1GG
- Usage band
- Approach · code 4
- Current edition
- 1.2
- Features
- 1,318
- S-57 layers
- 44
- Published
- Jul 28, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.00000° N
- South
- 29.70000° N
- West
- 92.10000° W
- East
- 91.80000° W
- Center
- 29.85000° N, 91.95000° W
- Bounds area
- 281 sq nm
- Feature density
- 4.6838 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 30
- Smallest layer
- 1
- Largest layer
- 200
- Area sq km
- 965
- Features per sq km
- 1.36558
- COALNE Coastline 200
- SLCONS Shoreline construction 106
- DEPARE Depth area 93
- LNDRGN Land region 92
- DAYMAR 68
- LIGHTS Light 67
- DEPCNT Depth contour 62
- SBDARE Seabed area 60
- BCNSPP Special purpose beacon 59
- RIVERS River 59
- LNDARE Land area 43
- SEAARE Sea area 40
- PILPNT 39
- CANALS 34
- M_QUAL Data quality 34
- BCNLAT Lateral beacon 31
- OBSTRN Obstruction 23
- BUISGL 22
- LAKARE 22
- OFSPLF 18
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/US4LA1GG.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1GG/1.2/US4LA1GG.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1GG/1.2/US4LA1GG.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4LA1GG/1.2/US4LA1GG.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1GG/1.2/US4LA1GG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1GG/1.2/US4LA1GG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1GG/1.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.2 | Jul 28, 2025 | metadata.json |