NOAA S-57 chart cell
Strait of Juan De Fuca to Strait of Georgia - Southern Part
US4WA31M
- Usage band
- Approach · code 4
- Current edition
- 20.2
- Features
- 2,961
- S-57 layers
- 55
- Published
- Feb 9, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 48.69507° N
- South
- 48.31742° N
- West
- 123.34047° W
- East
- 122.61261° W
- Center
- 48.50625° N, 122.97654° W
- Bounds area
- 656 sq nm
- Feature density
- 4.5103 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 53.8
- Smallest layer
- 1
- Largest layer
- 763
- Area sq km
- 2,252
- Features per sq km
- 1.315
- DEPCNT Depth contour 763
- DEPARE Depth area 699
- SBDARE Seabed area 365
- UWTROC Underwater rock 335
- SLCONS Shoreline construction 143
- COALNE Coastline 138
- LNDARE Land area 95
- SEAARE Sea area 45
- WEDKLP 42
- OBSTRN Obstruction 37
- PILPNT 33
- LNDRGN Land region 30
- RESARE 30
- LIGHTS Light 25
- BUISGL 17
- BCNSPP Special purpose beacon 14
- LNDELV 14
- CBLARE 11
- DAYMAR 11
- M_QUAL Data quality 11
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/US4WA31M.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4WA31M/20.2/US4WA31M.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4WA31M/20.2/US4WA31M.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4WA31M/20.2/US4WA31M.002
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4WA31M/20.2/US4WA31M.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4WA31M/20.2/US4WA31M.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4WA31M/20.2/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 20.2 | Feb 9, 2026 | metadata.json |