NOAA S-57 chart cell
Gulf Intracoastal Waterway - Pearl River to Lake Borgne
US4LA1HP
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 2,122
- S-57 layers
- 46
- Published
- Dec 4, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.30000° N
- South
- 30.00000° N
- West
- 89.70000° W
- East
- 89.40000° W
- Center
- 30.15000° N, 89.55000° W
- Bounds area
- 281 sq nm
- Feature density
- 7.5638 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 46.1
- Smallest layer
- 1
- Largest layer
- 221
- Area sq km
- 962
- Features per sq km
- 2.20526
- RIVERS River 221
- COALNE Coastline 205
- DEPARE Depth area 205
- DEPCNT Depth contour 186
- LNDRGN Land region 155
- SBDARE Seabed area 105
- LAKARE 103
- LIGHTS Light 97
- LNDARE Land area 97
- SEAARE Sea area 85
- PILPNT 75
- DAYMAR 72
- BCNLAT Lateral beacon 69
- BCNSPP Special purpose beacon 69
- OBSTRN Obstruction 59
- M_QUAL Data quality 47
- SLCONS Shoreline construction 47
- WRECKS Wreck 35
- CTNARE Caution area 25
- BRIDGE 22
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/US4LA1HP.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1HP/3.0/US4LA1HP.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1HP/3.0/US4LA1HP.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1HP/3.0/US4LA1HP.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1HP/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | Dec 4, 2025 | metadata.json |