NOAA S-57 chart cell
Gulf Intracoastal Waterway and Lake Salvador
US4LA1FM
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,417
- S-57 layers
- 44
- Published
- Mar 28, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 90.30000° W
- East
- 90.00000° W
- Center
- 29.55000° N, 90.15000° W
- Bounds area
- 282 sq nm
- Feature density
- 5.0206 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 32.2
- Smallest layer
- 1
- Largest layer
- 272
- Area sq km
- 968
- Features per sq km
- 1.46378
- COALNE Coastline 272
- LNDRGN Land region 179
- LNDARE Land area 144
- LAKARE 102
- LIGHTS Light 68
- RIVERS River 68
- CANALS 57
- BCNSPP Special purpose beacon 56
- DEPARE Depth area 56
- SLCONS Shoreline construction 51
- SEAARE Sea area 45
- DAYMAR 41
- M_QUAL Data quality 38
- BUISGL 30
- BCNLAT Lateral beacon 26
- DEPCNT Depth contour 19
- CTNARE Caution area 15
- OFSPLF 15
- SBDARE Seabed area 14
- DRGARE 11
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/US4LA1FM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1FM/1.0/US4LA1FM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FM/1.0/US4LA1FM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FM/1.0/US4LA1FM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FM/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Mar 28, 2025 | metadata.json |