NOAA S-57 chart cell
Approaches to Saint Catherines Sound and Sapelo Sound
US4GA1CG
- Usage band
- Approach · code 4
- Current edition
- 1.2
- Features
- 2,893
- S-57 layers
- 39
- Published
- Mar 23, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 31.80000° N
- South
- 31.50000° N
- West
- 81.30000° W
- East
- 81.00000° W
- Center
- 31.65000° N, 81.15000° W
- Bounds area
- 276 sq nm
- Feature density
- 10.4749 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 74.2
- Smallest layer
- 1
- Largest layer
- 678
- Area sq km
- 947
- Features per sq km
- 3.05399
- DEPARE Depth area 678
- DEPCNT Depth contour 630
- COALNE Coastline 456
- LNDRGN Land region 252
- RIVERS River 208
- LNDARE Land area 126
- SBDARE Seabed area 90
- SEAARE Sea area 72
- DAYMAR 68
- BCNLAT Lateral beacon 56
- RETRFL 46
- LIGHTS Light 29
- M_QUAL Data quality 27
- SLCONS Shoreline construction 25
- CTNARE Caution area 20
- BCNSPP Special purpose beacon 17
- SOUNDG Sounding 15
- OBSTRN Obstruction 14
- BOYLAT Lateral buoy 11
- RESARE 8
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/US4GA1CG.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4GA1CG/1.2/US4GA1CG.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4GA1CG/1.2/US4GA1CG.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4GA1CG/1.2/US4GA1CG.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4GA1CG/1.2/US4GA1CG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4GA1CG/1.2/US4GA1CG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4GA1CG/1.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.2 | Mar 23, 2026 | metadata.json |