NOAA S-57 chart cell
Northern Massachusetts
US4MA1GC
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 613
- S-57 layers
- 29
- Published
- Sep 4, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 42.30000° N
- South
- 42.00000° N
- West
- 71.10000° W
- East
- 70.80000° W
- Center
- 42.15000° N, 70.95000° W
- Bounds area
- 241 sq nm
- Feature density
- 2.5485 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 21.1
- Smallest layer
- 1
- Largest layer
- 151
- Area sq km
- 825
- Features per sq km
- 0.74302
- COALNE Coastline 151
- SLCONS Shoreline construction 107
- LNDRGN Land region 61
- RIVERS River 46
- LNDARE Land area 44
- SEAARE Sea area 28
- UWTROC Underwater rock 27
- BRIDGE 18
- DEPCNT Depth contour 18
- DEPARE Depth area 16
- BUAARE 15
- SBDARE Seabed area 13
- CTNARE Caution area 11
- PONTON 11
- M_QUAL Data quality 8
- RESARE 8
- LAKARE 6
- LNDMRK 6
- RDOSTA 5
- OBSTRN Obstruction 3
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/US4MA1GC.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MA1GC/1.0/US4MA1GC.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1GC/1.0/US4MA1GC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1GC/1.0/US4MA1GC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1GC/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Sep 4, 2024 | metadata.json |