NOAA S-57 chart cell
Rhode Island
US4RI1CB
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 226
- S-57 layers
- 26
- Published
- Jun 3, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 41.10000° N
- South
- 40.80000° N
- West
- 71.40000° W
- East
- 71.10000° W
- Center
- 40.95000° N, 71.25000° W
- Bounds area
- 245 sq nm
- Feature density
- 0.9223 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 8.7
- Smallest layer
- 1
- Largest layer
- 47
- Area sq km
- 840
- Features per sq km
- 0.2689
- LNDARE Land area 47
- LNDMRK 47
- LIGHTS Light 41
- CBLSUB 16
- DEPARE Depth area 13
- DEPCNT Depth contour 12
- FOGSIG 5
- SBDARE Seabed area 5
- WRECKS Wreck 5
- BOYSPP Special purpose buoy 4
- SEAARE Sea area 4
- SOUNDG Sounding 4
- DMPGRD 3
- M_QUAL Data quality 3
- CTNARE Caution area 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- OFSPLF 2
- RESARE 2
- CONZNE 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/US4RI1CB.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4RI1CB/2.0/US4RI1CB.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4RI1CB/2.0/US4RI1CB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4RI1CB/2.0/US4RI1CB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4RI1CB/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Jun 3, 2026 | metadata.json |