NOAA S-57 chart cell
Southern Massachusetts
US4MA1EG
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 503
- S-57 layers
- 27
- Published
- Apr 29, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 41.70000° N
- South
- 41.40000° N
- West
- 69.90000° W
- East
- 69.60000° W
- Center
- 41.55000° N, 69.75000° W
- Bounds area
- 243 sq nm
- Feature density
- 2.0716 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 18.6
- Smallest layer
- 1
- Largest layer
- 183
- Area sq km
- 833
- Features per sq km
- 0.604
- DEPCNT Depth contour 183
- DEPARE Depth area 179
- SBDARE Seabed area 65
- SEAARE Sea area 12
- SOUNDG Sounding 11
- WATTUR 8
- BOYLAT Lateral buoy 7
- LIGHTS Light 7
- M_QUAL Data quality 4
- WRECKS Wreck 4
- CTNARE Caution area 3
- RESARE 3
- M_NPUB 2
- MAGVAR Magnetic variation 2
- ACHARE Anchorage area 1
- ADMARE 1
- CBLSUB 1
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 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/US4MA1EG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MA1EG/2.0/US4MA1EG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1EG/2.0/US4MA1EG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1EG/2.0/US4MA1EG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1EG/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Apr 29, 2024 | metadata.json |