NOAA S-57 chart cell
Approaches to San Francisco Bay - Golden Gate to Half Moon Bay, CA
US4CA2BJ
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 811
- S-57 layers
- 57
- Published
- Jan 16, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 37.80000° N
- South
- 37.50000° N
- West
- 122.70000° W
- East
- 122.40000° W
- Center
- 37.65000° N, 122.55000° W
- Bounds area
- 257 sq nm
- Feature density
- 3.1572 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 14.2
- Smallest layer
- 1
- Largest layer
- 110
- Area sq km
- 881
- Features per sq km
- 0.92048
- SBDARE Seabed area 110
- UWTROC Underwater rock 105
- DEPCNT Depth contour 91
- DEPARE Depth area 84
- LNDARE Land area 59
- BUISGL 36
- SLCONS Shoreline construction 27
- BUAARE 26
- COALNE Coastline 26
- SOUNDG Sounding 24
- LNDRGN Land region 21
- LIGHTS Light 18
- M_QUAL Data quality 18
- LNDMRK 16
- RIVERS River 12
- LAKARE 10
- OBSTRN Obstruction 10
- SEAARE Sea area 10
- BOYLAT Lateral buoy 9
- LNDELV 9
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/US4CA2BJ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4CA2BJ/1.0/US4CA2BJ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4CA2BJ/1.0/US4CA2BJ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4CA2BJ/1.0/US4CA2BJ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4CA2BJ/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 16, 2026 | metadata.json |