NOAA S-57 chart cell
California
US4CA1GM
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,217
- S-57 layers
- 25
- Published
- Apr 1, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 34.20000° N
- South
- 33.90000° N
- West
- 120.60000° W
- East
- 120.30000° W
- Center
- 34.05000° N, 120.45000° W
- Bounds area
- 269 sq nm
- Feature density
- 4.5273 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 48.7
- Smallest layer
- 1
- Largest layer
- 257
- Area sq km
- 922
- Features per sq km
- 1.31995
- DEPCNT Depth contour 257
- DEPARE Depth area 241
- SBDARE Seabed area 209
- UWTROC Underwater rock 169
- WEDKLP 115
- LNDARE Land area 44
- COALNE Coastline 40
- LNDELV 30
- M_QUAL Data quality 24
- SOUNDG Sounding 21
- OBSTRN Obstruction 16
- RIVERS River 15
- SEAARE Sea area 9
- LNDRGN Land region 5
- SLOTOP 4
- WATTUR 4
- RESARE 3
- BCNSPP Special purpose beacon 2
- M_NPUB 2
- MIPARE 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/US4CA1GM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4CA1GM/1.0/US4CA1GM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4CA1GM/1.0/US4CA1GM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4CA1GM/1.0/US4CA1GM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4CA1GM/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 1, 2026 | metadata.json |