NOAA S-57 chart cell
Southern Massachusetts
US4MA1DG
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 740
- S-57 layers
- 19
- Published
- Apr 29, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 41.40000° N
- South
- 41.10000° N
- West
- 69.90000° W
- East
- 69.60000° W
- Center
- 41.25000° N, 69.75000° W
- Bounds area
- 244 sq nm
- Feature density
- 3.0337 / sq nm
Chart Statistics
19 largest layers shown
- Average features per layer
- 38.9
- Smallest layer
- 1
- Largest layer
- 307
- Area sq km
- 837
- Features per sq km
- 0.88449
- DEPCNT Depth contour 307
- DEPARE Depth area 277
- SBDARE Seabed area 102
- WATTUR 16
- SEAARE Sea area 13
- SOUNDG Sounding 8
- RESARE 3
- M_NPUB 2
- WRECKS Wreck 2
- ACHARE Anchorage area 1
- ADMARE 1
- CONZNE 1
- CTNARE Caution area 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- M_QUAL Data quality 1
- MAGVAR Magnetic variation 1
- TESARE 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/US4MA1DG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MA1DG/2.0/US4MA1DG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1DG/2.0/US4MA1DG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1DG/2.0/US4MA1DG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1DG/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Apr 29, 2024 | metadata.json |