NOAA S-57 chart cell
Southern Massachusetts
US4MA1DF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 758
- S-57 layers
- 46
- Published
- Jul 30, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 41.40000° N
- South
- 41.10000° N
- West
- 70.20000° W
- East
- 69.90000° W
- Center
- 41.25000° N, 70.05000° W
- Bounds area
- 244 sq nm
- Feature density
- 3.1075 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 16.5
- Smallest layer
- 1
- Largest layer
- 220
- Area sq km
- 837
- Features per sq km
- 0.90601
- DEPCNT Depth contour 220
- DEPARE Depth area 210
- SBDARE Seabed area 49
- BOYLAT Lateral buoy 34
- COALNE Coastline 32
- SEAARE Sea area 32
- LNDRGN Land region 25
- LIGHTS Light 17
- CTNARE Caution area 14
- SLCONS Shoreline construction 14
- SOUNDG Sounding 11
- UWTROC Underwater rock 11
- M_QUAL Data quality 10
- LAKARE 7
- LNDMRK 7
- WRECKS Wreck 7
- ACHARE Anchorage area 5
- BUAARE 5
- RESARE 5
- OBSTRN Obstruction 4
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/US4MA1DF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MA1DF/1.0/US4MA1DF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1DF/1.0/US4MA1DF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1DF/1.0/US4MA1DF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1DF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jul 30, 2024 | metadata.json |