NOAA S-57 chart cell
North Pacific Ocean - Northern Approaches to Johnston Atoll
US3UM1SI
- Usage band
- Coastal · code 3
- Current edition
- 1.0
- Features
- 23
- S-57 layers
- 16
- Published
- Jun 10, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 18.00000° N
- South
- 16.80000° N
- West
- 170.40000° W
- East
- 169.20000° W
- Center
- 17.40000° N, 169.80000° W
- Bounds area
- 4,953 sq nm
- Feature density
- 0.0046 / sq nm
Chart Statistics
16 largest layers shown
- Average features per layer
- 1.4
- Smallest layer
- 1
- Largest layer
- 3
- Area sq km
- 16,990
- Features per sq km
- 0.00135
- M_QUAL Data quality 3
- DEPARE Depth area 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- SEAARE Sea area 2
- SOUNDG Sounding 2
- ADMARE 1
- CBLSUB 1
- CONZNE 1
- COSARE 1
- DEPCNT Depth contour 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- RESARE 1
- TESARE 1
Nearby Chart Cells
Coastal 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/US3UM1SI.zip
- S-57 cell https://charts.openships.ai/noaa/s57/coastal/US3UM1SI/1.0/US3UM1SI.000
- GeoJSON https://charts.openships.ai/noaa/s57/coastal/US3UM1SI/1.0/US3UM1SI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/coastal/US3UM1SI/1.0/US3UM1SI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/coastal/US3UM1SI/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jun 10, 2026 | metadata.json |