NOAA S-57 chart cell
Columbia River Entrance to Portland
US4OR1MH
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 2,895
- S-57 layers
- 59
- Published
- May 29, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 45.90000° N
- South
- 45.60000° N
- West
- 123.00000° W
- East
- 122.70000° W
- Center
- 45.75000° N, 122.85000° W
- Bounds area
- 226 sq nm
- Feature density
- 12.7877 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 49.1
- Smallest layer
- 1
- Largest layer
- 503
- Area sq km
- 776
- Features per sq km
- 3.7283
- PILPNT 503
- DEPARE Depth area 364
- DEPCNT Depth contour 361
- SLCONS Shoreline construction 335
- COALNE Coastline 237
- BUISGL 97
- OBSTRN Obstruction 84
- LIGHTS Light 77
- RIVERS River 61
- SBDARE Seabed area 58
- MORFAC 56
- LNDRGN Land region 55
- DAYMAR 51
- LAKARE 43
- LNDARE Land area 40
- M_QUAL Data quality 38
- BCNLAT Lateral beacon 37
- PONTON 34
- CBLOHD 26
- DYKCON 25
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/US4OR1MH.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4OR1MH/1.1/US4OR1MH.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4OR1MH/1.1/US4OR1MH.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4OR1MH/1.1/US4OR1MH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4OR1MH/1.1/US4OR1MH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4OR1MH/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | May 29, 2026 | metadata.json |