NOAA S-57 chart cell
Potomac River - Nanjemoy Creek to Dogue Creek
US4VA1GB
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 3,425
- S-57 layers
- 52
- Published
- Apr 3, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 38.70000° N
- South
- 38.40000° N
- West
- 77.40000° W
- East
- 77.10000° W
- Center
- 38.55000° N, 77.25000° W
- Bounds area
- 254 sq nm
- Feature density
- 13.4985 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 65.9
- Smallest layer
- 1
- Largest layer
- 856
- Area sq km
- 870
- Features per sq km
- 3.93554
- COALNE Coastline 856
- SLCONS Shoreline construction 496
- LNDRGN Land region 374
- DEPCNT Depth contour 328
- DEPARE Depth area 304
- PILPNT 160
- OBSTRN Obstruction 126
- SBDARE Seabed area 86
- LNDARE Land area 76
- DAYMAR 47
- LIGHTS Light 44
- BCNLAT Lateral beacon 42
- BUISGL 40
- WRECKS Wreck 40
- RIVERS River 37
- SEAARE Sea area 35
- BOYLAT Lateral buoy 33
- UWTROC Underwater rock 25
- WEDKLP 23
- BCNSPP Special purpose beacon 22
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/US4VA1GB.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4VA1GB/1.0/US4VA1GB.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4VA1GB/1.0/US4VA1GB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4VA1GB/1.0/US4VA1GB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4VA1GB/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 3, 2026 | metadata.json |