NOAA S-57 chart cell
Gulf of the Farallones - Offshore of Point Reyes Beach, CA
US4CA2CH
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 307
- S-57 layers
- 39
- Published
- Jan 16, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 38.10000° N
- South
- 37.80000° N
- West
- 123.30000° W
- East
- 123.00000° W
- Center
- 37.95000° N, 123.15000° W
- Bounds area
- 256 sq nm
- Feature density
- 1.2 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 7.9
- Smallest layer
- 1
- Largest layer
- 53
- Area sq km
- 877
- Features per sq km
- 0.34986
- DEPCNT Depth contour 53
- DEPARE Depth area 47
- SBDARE Seabed area 43
- LNDARE Land area 28
- M_QUAL Data quality 22
- OBSTRN Obstruction 20
- SOUNDG Sounding 18
- BUISGL 10
- UWTROC Underwater rock 10
- TSSBND 5
- SLOTOP 4
- TSSLPT 4
- BCNSPP Special purpose beacon 3
- CBLSUB 3
- COALNE Coastline 3
- ADMARE 2
- CTNARE Caution area 2
- LIGHTS Light 2
- LNDMRK 2
- M_NPUB 2
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/US4CA2CH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4CA2CH/1.0/US4CA2CH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4CA2CH/1.0/US4CA2CH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4CA2CH/1.0/US4CA2CH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4CA2CH/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 16, 2026 | metadata.json |