NOAA S-57 chart cell
Approaches to Doboy Sound and Altamaha Sound - North Atlantic Ocean
US4GA1BG
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 965
- S-57 layers
- 39
- Published
- Mar 24, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 31.50000° N
- South
- 31.20000° N
- West
- 81.30000° W
- East
- 81.00000° W
- Center
- 31.35000° N, 81.15000° W
- Bounds area
- 277 sq nm
- Feature density
- 3.4829 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 24.7
- Smallest layer
- 1
- Largest layer
- 215
- Area sq km
- 950
- Features per sq km
- 1.01544
- DEPARE Depth area 215
- DEPCNT Depth contour 208
- COALNE Coastline 111
- SBDARE Seabed area 89
- RIVERS River 83
- LNDRGN Land region 65
- LNDARE Land area 35
- SEAARE Sea area 25
- M_QUAL Data quality 21
- CTNARE Caution area 19
- SOUNDG Sounding 11
- SLCONS Shoreline construction 10
- RESARE 9
- WRECKS Wreck 9
- LAKARE 8
- MAGVAR Magnetic variation 7
- BOYLAT Lateral buoy 5
- LIGHTS Light 4
- BUAARE 3
- PILPNT 3
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/US4GA1BG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4GA1BG/1.0/US4GA1BG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4GA1BG/1.0/US4GA1BG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4GA1BG/1.0/US4GA1BG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4GA1BG/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Mar 24, 2025 | metadata.json |