NOAA S-57 chart cell
Gulf Intracoastal Waterway - West Cote Blanche Bay including Bayou Teche
US4LA1GH
- Usage band
- Approach · code 4
- Current edition
- 1.2
- Features
- 946
- S-57 layers
- 50
- Published
- Nov 25, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.00000° N
- South
- 29.70000° N
- West
- 91.80000° W
- East
- 91.50000° W
- Center
- 29.85000° N, 91.65000° W
- Bounds area
- 281 sq nm
- Feature density
- 3.3618 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 18.9
- Smallest layer
- 1
- Largest layer
- 173
- Area sq km
- 965
- Features per sq km
- 0.98015
- COALNE Coastline 173
- LNDRGN Land region 86
- DEPARE Depth area 75
- LNDARE Land area 57
- RIVERS River 51
- CANALS 48
- SEAARE Sea area 38
- BUISGL 31
- CBLOHD 28
- BRIDGE 27
- M_QUAL Data quality 24
- DEPCNT Depth contour 23
- SBDARE Seabed area 22
- SLCONS Shoreline construction 22
- PILPNT 21
- CTNARE Caution area 20
- BUAARE 19
- BOYLAT Lateral buoy 18
- SILTNK 17
- PIPARE 16
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/US4LA1GH.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1GH/1.2/US4LA1GH.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1GH/1.2/US4LA1GH.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4LA1GH/1.2/US4LA1GH.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1GH/1.2/US4LA1GH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1GH/1.2/US4LA1GH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1GH/1.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.2 | Nov 25, 2025 | metadata.json |