NOAA S-57 chart cell
California
US4CA1HM
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 241
- S-57 layers
- 36
- Published
- Apr 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 34.50000° N
- South
- 34.20000° N
- West
- 120.60000° W
- East
- 120.30000° W
- Center
- 34.35000° N, 120.45000° W
- Bounds area
- 268 sq nm
- Feature density
- 0.8997 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.7
- Smallest layer
- 1
- Largest layer
- 39
- Area sq km
- 919
- Features per sq km
- 0.26232
- SBDARE Seabed area 39
- DEPCNT Depth contour 31
- OBSTRN Obstruction 25
- DEPARE Depth area 23
- UWTROC Underwater rock 23
- M_QUAL Data quality 12
- WEDKLP 12
- SOUNDG Sounding 10
- LNDELV 6
- BUAARE 5
- RIVERS River 5
- CTNARE Caution area 4
- MIPARE 4
- MORFAC 4
- RESARE 4
- LNDARE Land area 3
- PIPSOL 3
- SEAARE Sea area 3
- BOYSPP Special purpose buoy 2
- COALNE Coastline 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/US4CA1HM.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4CA1HM/1.1/US4CA1HM.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4CA1HM/1.1/US4CA1HM.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4CA1HM/1.1/US4CA1HM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4CA1HM/1.1/US4CA1HM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4CA1HM/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Apr 22, 2026 | metadata.json |