NOAA S-57 chart cell
Gulf Intracoastal Waterway and Houma Navigation Channel
US4LA1FK
- Usage band
- Approach · code 4
- Current edition
- 2.2
- Features
- 1,363
- S-57 layers
- 43
- Published
- Dec 12, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 90.90000° W
- East
- 90.60000° W
- Center
- 29.55000° N, 90.75000° W
- Bounds area
- 282 sq nm
- Feature density
- 4.8293 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 31.7
- Smallest layer
- 1
- Largest layer
- 276
- Area sq km
- 968
- Features per sq km
- 1.40799
- COALNE Coastline 276
- SLCONS Shoreline construction 176
- LNDRGN Land region 161
- BUISGL 105
- DEPARE Depth area 70
- LNDARE Land area 61
- RIVERS River 61
- CANALS 59
- CBLOHD 53
- DEPCNT Depth contour 43
- BRIDGE 32
- VEGATN 28
- SEAARE Sea area 26
- LAKARE 22
- PIPARE 22
- M_QUAL Data quality 21
- BUAARE 18
- CTNARE Caution area 18
- PYLONS 13
- SILTNK 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/US4LA1FK.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1FK/2.2/US4LA1FK.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1FK/2.2/US4LA1FK.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4LA1FK/2.2/US4LA1FK.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FK/2.2/US4LA1FK.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FK/2.2/US4LA1FK.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FK/2.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.2 | Dec 12, 2025 | metadata.json |