NOAA S-57 chart cell
Gulf of America
US4LA1GR
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 161
- S-57 layers
- 25
- Published
- May 9, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.00000° N
- South
- 29.70000° N
- West
- 88.80000° W
- East
- 88.50000° W
- Center
- 29.85000° N, 88.65000° W
- Bounds area
- 281 sq nm
- Feature density
- 0.5721 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.4
- Smallest layer
- 1
- Largest layer
- 51
- Area sq km
- 965
- Features per sq km
- 0.16681
- PIPSOL 51
- SBDARE Seabed area 28
- M_QUAL Data quality 16
- SOUNDG Sounding 16
- OFSPLF 7
- OBSTRN Obstruction 6
- DEPARE Depth area 5
- DEPCNT Depth contour 5
- WRECKS Wreck 4
- CTNARE Caution area 2
- DMPGRD 2
- LNDARE Land area 2
- LNDMRK 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- TESARE 2
- ADMARE 1
- BCNSPP Special purpose beacon 1
- CONZNE 1
- EXEZNE 1
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/US4LA1GR.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4LA1GR/2.0/US4LA1GR.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1GR/2.0/US4LA1GR.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1GR/2.0/US4LA1GR.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1GR/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | May 9, 2025 | metadata.json |