NOAA S-57 chart cell
Northern Massachusetts
US4MA1IF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 145
- S-57 layers
- 19
- Published
- Jun 5, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 42.90000° N
- South
- 42.60000° N
- West
- 70.20000° W
- East
- 69.90000° W
- Center
- 42.75000° N, 70.05000° W
- Bounds area
- 238 sq nm
- Feature density
- 0.6086 / sq nm
Chart Statistics
19 largest layers shown
- Average features per layer
- 7.6
- Smallest layer
- 1
- Largest layer
- 51
- Area sq km
- 817
- Features per sq km
- 0.17745
- DEPCNT Depth contour 51
- DEPARE Depth area 50
- SOUNDG Sounding 11
- SBDARE Seabed area 5
- SEAARE Sea area 5
- M_QUAL Data quality 4
- BOYSPP Special purpose buoy 2
- CBLSUB 2
- LIGHTS Light 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- RESARE 2
- CONZNE 1
- CTNARE Caution area 1
- DMPGRD 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- WRECKS Wreck 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/US4MA1IF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MA1IF/1.0/US4MA1IF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1IF/1.0/US4MA1IF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1IF/1.0/US4MA1IF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1IF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jun 5, 2024 | metadata.json |