NOAA S-57 chart cell
California
US4CA1IM
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 92
- S-57 layers
- 23
- Published
- Apr 1, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 34.80000° N
- South
- 34.50000° N
- West
- 120.60000° W
- East
- 120.30000° W
- Center
- 34.65000° N, 120.45000° W
- Bounds area
- 267 sq nm
- Feature density
- 0.3447 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 4
- Smallest layer
- 1
- Largest layer
- 17
- Area sq km
- 915
- Features per sq km
- 0.1005
- UWTROC Underwater rock 17
- SBDARE Seabed area 14
- DEPCNT Depth contour 12
- DEPARE Depth area 9
- RIVERS River 7
- LNDARE Land area 4
- LNDELV 4
- SOUNDG Sounding 4
- M_QUAL Data quality 3
- WEDKLP 3
- LNDMRK 2
- MIPARE 2
- ADMARE 1
- BUAARE 1
- C_ASSO 1
- COALNE Coastline 1
- LNDRGN Land region 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
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/US4CA1IM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4CA1IM/1.0/US4CA1IM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4CA1IM/1.0/US4CA1IM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4CA1IM/1.0/US4CA1IM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4CA1IM/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 1, 2026 | metadata.json |