NOAA S-57 chart cell
Bayou Lacassine and Mermentau River
US4LA1HD
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 193
- S-57 layers
- 29
- Published
- Aug 23, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.30000° N
- South
- 30.00000° N
- West
- 93.00000° W
- East
- 92.70000° W
- Center
- 30.15000° N, 92.85000° W
- Bounds area
- 281 sq nm
- Feature density
- 0.6879 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.7
- Smallest layer
- 1
- Largest layer
- 32
- Area sq km
- 962
- Features per sq km
- 0.20057
- COALNE Coastline 32
- SLCONS Shoreline construction 23
- LNDRGN Land region 20
- DAYMAR 16
- BCNLAT Lateral beacon 13
- BUAARE 9
- LIGHTS Light 8
- SEAARE Sea area 8
- CTNARE Caution area 7
- LNDARE Land area 7
- CANALS 6
- PILPNT 6
- BCNSPP Special purpose beacon 5
- DEPARE Depth area 5
- M_QUAL Data quality 5
- RIVERS River 5
- C_AGGR 2
- DISMAR 2
- NAVLNE 2
- RECTRC 2
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/US4LA1HD.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1HD/1.1/US4LA1HD.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1HD/1.1/US4LA1HD.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1HD/1.1/US4LA1HD.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1HD/1.1/US4LA1HD.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1HD/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Aug 23, 2024 | metadata.json |