NOAA S-57 chart cell
Terrebonne Bay and Timbalier Bay - Gulf of America
US4LA1DL
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,145
- S-57 layers
- 39
- Published
- Mar 28, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.10000° N
- South
- 28.80000° N
- West
- 90.60000° W
- East
- 90.30000° W
- Center
- 28.95000° N, 90.45000° W
- Bounds area
- 284 sq nm
- Feature density
- 4.0332 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 29.4
- Smallest layer
- 1
- Largest layer
- 266
- Area sq km
- 974
- Features per sq km
- 1.17588
- PIPSOL 266
- OBSTRN Obstruction 189
- OFSPLF 140
- PILPNT 94
- SBDARE Seabed area 60
- DEPCNT Depth contour 53
- DEPARE Depth area 50
- COALNE Coastline 47
- MORFAC 31
- SLCONS Shoreline construction 31
- LNDARE Land area 26
- DAYMAR 20
- LNDRGN Land region 19
- BCNLAT Lateral beacon 17
- LIGHTS Light 16
- BOYLAT Lateral buoy 15
- WRECKS Wreck 15
- M_QUAL Data quality 11
- SOUNDG Sounding 10
- SEAARE Sea area 7
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/US4LA1DL.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1DL/1.0/US4LA1DL.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1DL/1.0/US4LA1DL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1DL/1.0/US4LA1DL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1DL/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Mar 28, 2025 | metadata.json |