NOAA S-57 chart cell
Altamaha River
US4GA1BF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 2,280
- S-57 layers
- 38
- Published
- Mar 24, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 31.50000° N
- South
- 31.20000° N
- West
- 81.60000° W
- East
- 81.30000° W
- Center
- 31.35000° N, 81.45000° W
- Bounds area
- 277 sq nm
- Feature density
- 8.2289 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 60
- Smallest layer
- 1
- Largest layer
- 568
- Area sq km
- 950
- Features per sq km
- 2.39917
- COALNE Coastline 568
- DEPARE Depth area 284
- DEPCNT Depth contour 265
- LNDRGN Land region 207
- RIVERS River 190
- LNDARE Land area 138
- DAYMAR 116
- BCNLAT Lateral beacon 107
- SEAARE Sea area 82
- RETRFL 66
- LIGHTS Light 38
- M_QUAL Data quality 34
- SBDARE Seabed area 20
- CTNARE Caution area 18
- BUAARE 17
- SLCONS Shoreline construction 17
- BRIDGE 16
- RESARE 15
- CBLOHD 14
- SOUNDG Sounding 14
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/US4GA1BF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4GA1BF/1.0/US4GA1BF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4GA1BF/1.0/US4GA1BF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4GA1BF/1.0/US4GA1BF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4GA1BF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Mar 24, 2025 | metadata.json |