NOAA S-57 chart cell
Northern Massachusetts
US4MA1HE
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 131
- S-57 layers
- 21
- Published
- Apr 29, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 42.60000° N
- South
- 42.30000° N
- West
- 70.50000° W
- East
- 70.20000° W
- Center
- 42.45000° N, 70.35000° W
- Bounds area
- 239 sq nm
- Feature density
- 0.5472 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.2
- Smallest layer
- 1
- Largest layer
- 31
- Area sq km
- 821
- Features per sq km
- 0.15954
- SBDARE Seabed area 31
- DEPCNT Depth contour 24
- DEPARE Depth area 20
- WRECKS Wreck 16
- SOUNDG Sounding 12
- SEAARE Sea area 4
- BOYSPP Special purpose buoy 3
- LIGHTS Light 3
- RESARE 3
- MAGVAR Magnetic variation 2
- TSSBND 2
- TSSLPT 2
- CONZNE 1
- CTNARE Caution area 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- M_QUAL Data quality 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/US4MA1HE.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MA1HE/1.0/US4MA1HE.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1HE/1.0/US4MA1HE.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1HE/1.0/US4MA1HE.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1HE/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 29, 2024 | metadata.json |