NOAA S-57 chart cell
Blue Hill Harbor, Morgan Bay and Union River Bay
US4ME1EI
- Usage band
- Approach · code 4
- Current edition
- 1.3
- Features
- 640
- S-57 layers
- 30
- Published
- Jul 25, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 44.70000° N
- South
- 44.40000° N
- West
- 68.70000° W
- East
- 68.40000° W
- Center
- 44.55000° N, 68.55000° W
- Bounds area
- 231 sq nm
- Feature density
- 2.7681 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 21.3
- Smallest layer
- 1
- Largest layer
- 144
- Area sq km
- 793
- Features per sq km
- 0.80704
- DEPCNT Depth contour 144
- SBDARE Seabed area 127
- DEPARE Depth area 104
- UWTROC Underwater rock 61
- LNDARE Land area 46
- RIVERS River 30
- SEAARE Sea area 16
- BOYLAT Lateral buoy 13
- LNDRGN Land region 13
- BUAARE 11
- COALNE Coastline 11
- OBSTRN Obstruction 9
- SLCONS Shoreline construction 9
- LNDMRK 8
- SOUNDG Sounding 8
- M_QUAL Data quality 7
- BRIDGE 4
- DRGARE 3
- FAIRWY Fairway 2
- LNDELV 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/US4ME1EI.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4ME1EI/1.3/US4ME1EI.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4ME1EI/1.3/US4ME1EI.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4ME1EI/1.3/US4ME1EI.002
- S-57 update 003 https://charts.openships.ai/noaa/s57/approach/US4ME1EI/1.3/US4ME1EI.003
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4ME1EI/1.3/US4ME1EI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4ME1EI/1.3/US4ME1EI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4ME1EI/1.3/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.3 | Jul 25, 2025 | metadata.json |