NOAA S-57 chart cell
Lake Pontchartrain
US3LA1DC
- Usage band
- Coastal · code 3
- Current edition
- 1.0
- Features
- 240
- S-57 layers
- 19
- Published
- Jul 9, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 31.20000° N
- South
- 30.00000° N
- West
- 91.20000° W
- East
- 90.00000° W
- Center
- 30.60000° N, 90.60000° W
- Bounds area
- 4,468 sq nm
- Feature density
- 0.0537 / sq nm
Chart Statistics
19 largest layers shown
- Average features per layer
- 12.6
- Smallest layer
- 1
- Largest layer
- 59
- Area sq km
- 15,325
- Features per sq km
- 0.01566
- BUAARE 59
- COALNE Coastline 59
- LNDRGN Land region 28
- BRIDGE 19
- RIVERS River 15
- SLCONS Shoreline construction 14
- SEAARE Sea area 10
- DEPARE Depth area 6
- LNDARE Land area 5
- CTNARE Caution area 4
- M_QUAL Data quality 4
- CANALS 3
- CBLOHD 3
- DEPCNT Depth contour 3
- MAGVAR Magnetic variation 3
- DYKCON 2
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
Nearby Chart Cells
Coastal 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/US3LA1DC.zip
- S-57 cell https://charts.openships.ai/noaa/s57/coastal/US3LA1DC/1.0/US3LA1DC.000
- GeoJSON https://charts.openships.ai/noaa/s57/coastal/US3LA1DC/1.0/US3LA1DC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/coastal/US3LA1DC/1.0/US3LA1DC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/coastal/US3LA1DC/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jul 9, 2025 | metadata.json |