NOAA S-57 chart cell
Gulf of America to Chandeleur Sound
US4LA1FQ
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 698
- S-57 layers
- 29
- Published
- May 30, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 89.10000° W
- East
- 88.80000° W
- Center
- 29.55000° N, 88.95000° W
- Bounds area
- 282 sq nm
- Feature density
- 2.4731 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 24.1
- Smallest layer
- 1
- Largest layer
- 343
- Area sq km
- 968
- Features per sq km
- 0.72104
- PIPSOL 343
- OFSPLF 99
- SBDARE Seabed area 56
- DEPCNT Depth contour 39
- DEPARE Depth area 32
- M_QUAL Data quality 30
- SOUNDG Sounding 26
- OBSTRN Obstruction 18
- BCNSPP Special purpose beacon 10
- WRECKS Wreck 10
- CTNARE Caution area 6
- DMPGRD 4
- ACHARE Anchorage area 2
- ADMARE 2
- BOYSPP Special purpose buoy 2
- COALNE Coastline 2
- LNDARE Land area 2
- MAGVAR Magnetic variation 2
- SEAARE Sea area 2
- UNSARE 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/US4LA1FQ.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1FQ/1.1/US4LA1FQ.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1FQ/1.1/US4LA1FQ.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FQ/1.1/US4LA1FQ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FQ/1.1/US4LA1FQ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FQ/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | May 30, 2025 | metadata.json |