NOAA S-57 chart cell
Catfish Lake - Terrebonne Bay and Timbalier Bay
US4LA1EL
- Usage band
- Approach · code 4
- Current edition
- 1.3
- Features
- 3,704
- S-57 layers
- 41
- Published
- Jan 20, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.40000° N
- South
- 29.10000° N
- West
- 90.60000° W
- East
- 90.30000° W
- Center
- 29.25000° N, 90.45000° W
- Bounds area
- 283 sq nm
- Feature density
- 13.0851 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 90.3
- Smallest layer
- 1
- Largest layer
- 1,265
- Area sq km
- 971
- Features per sq km
- 3.815
- LNDARE Land area 1,265
- COALNE Coastline 468
- LNDRGN Land region 401
- OBSTRN Obstruction 375
- DEPARE Depth area 191
- DEPCNT Depth contour 170
- RIVERS River 159
- SBDARE Seabed area 95
- OFSPLF 92
- SEAARE Sea area 87
- SLCONS Shoreline construction 61
- PILPNT 58
- M_QUAL Data quality 45
- CTNARE Caution area 34
- DAYMAR 30
- LIGHTS Light 28
- LAKARE 25
- PIPSOL 25
- BCNLAT Lateral beacon 20
- BCNSPP Special purpose beacon 17
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/US4LA1EL.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1EL/1.3/US4LA1EL.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1EL/1.3/US4LA1EL.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4LA1EL/1.3/US4LA1EL.002
- S-57 update 003 https://charts.openships.ai/noaa/s57/approach/US4LA1EL/1.3/US4LA1EL.003
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1EL/1.3/US4LA1EL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1EL/1.3/US4LA1EL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1EL/1.3/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.3 | Jan 20, 2026 | metadata.json |