NOAA S-57 chart cell
Southern Massachusetts
US4MA1BD
- Usage band
- Approach · code 4
- Current edition
- 1.3
- Features
- 22
- S-57 layers
- 15
- Published
- Jul 7, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 40.80000° N
- South
- 40.50000° N
- West
- 70.80000° W
- East
- 70.50000° W
- Center
- 40.65000° N, 70.65000° W
- Bounds area
- 246 sq nm
- Feature density
- 0.0894 / sq nm
Chart Statistics
15 largest layers shown
- Average features per layer
- 1.5
- Smallest layer
- 1
- Largest layer
- 4
- Area sq km
- 844
- Features per sq km
- 0.02606
- SBDARE Seabed area 4
- DEPARE Depth area 3
- DEPCNT Depth contour 2
- M_NPUB 2
- BOYSPP Special purpose buoy 1
- DMPGRD 1
- EXEZNE 1
- FAIRWY Fairway 1
- LIGHTS Light 1
- M_COVR Coverage 1
- M_NSYS 1
- M_QUAL Data quality 1
- MAGVAR Magnetic variation 1
- SEAARE Sea area 1
- SOUNDG Sounding 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/US4MA1BD.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4MA1BD/1.3/US4MA1BD.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4MA1BD/1.3/US4MA1BD.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4MA1BD/1.3/US4MA1BD.002
- S-57 update 003 https://charts.openships.ai/noaa/s57/approach/US4MA1BD/1.3/US4MA1BD.003
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1BD/1.3/US4MA1BD.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1BD/1.3/US4MA1BD.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1BD/1.3/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.3 | Jul 7, 2025 | metadata.json |