NOAA S-57 chart cell
California
US4CA1IL
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 228
- S-57 layers
- 36
- Published
- Apr 1, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 34.80000° N
- South
- 34.50000° N
- West
- 120.90000° W
- East
- 120.60000° W
- Center
- 34.65000° N, 120.75000° W
- Bounds area
- 267 sq nm
- Feature density
- 0.8543 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.3
- Smallest layer
- 1
- Largest layer
- 40
- Area sq km
- 915
- Features per sq km
- 0.24906
- SBDARE Seabed area 40
- UWTROC Underwater rock 38
- DEPCNT Depth contour 33
- DEPARE Depth area 23
- LNDARE Land area 19
- COALNE Coastline 7
- LNDRGN Land region 7
- MIPARE 7
- OBSTRN Obstruction 6
- SOUNDG Sounding 5
- M_QUAL Data quality 4
- BUAARE 3
- LNDMRK 3
- MORFAC 3
- WEDKLP 3
- MAGVAR Magnetic variation 2
- PIPSOL 2
- RESARE 2
- RIVERS River 2
- SILTNK 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/US4CA1IL.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4CA1IL/1.0/US4CA1IL.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4CA1IL/1.0/US4CA1IL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4CA1IL/1.0/US4CA1IL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4CA1IL/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 1, 2026 | metadata.json |