NOAA S-57 chart cell

Northern Massachusetts

US4MA1ID

Usage band
Approach · code 4
Current edition
1.7
Features
1,667
S-57 layers
48
Published
Apr 17, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
42.90000° N
South
42.60000° N
West
70.80000° W
East
70.50000° W
Center
42.75000° N, 70.65000° W
Bounds area
238 sq nm
Feature density
6.9971 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
34.7
Smallest layer
1
Largest layer
298
Area sq km
817
Features per sq km
2.04003
  1. COALNE Coastline 298
  2. DEPCNT Depth contour 229
  3. DEPARE Depth area 205
  4. SLCONS Shoreline construction 135
  5. SBDARE Seabed area 125
  6. LNDRGN Land region 112
  7. LNDARE Land area 110
  8. UWTROC Underwater rock 103
  9. RIVERS River 81
  10. LAKARE 43
  11. BOYLAT Lateral buoy 23
  12. LNDMRK 21
  13. LIGHTS Light 20
  14. SEAARE Sea area 20
  15. SOUNDG Sounding 13
  16. WRECKS Wreck 12
  17. CTNARE Caution area 11
  18. PONTON 11
  19. M_QUAL Data quality 9
  20. BUAARE 8

Nearby Chart Cells

Approach usage band

  1. Northern Massachusetts US4MA1IC - about 13 nm away
  2. Northern Massachusetts US4MA1IE - about 13 nm away
  3. New Hampshire US4NH1BD - about 18 nm away
  4. Northern Massachusetts US4MA1HD - about 18 nm away
  5. New Hampshire US4NH1BC - about 22 nm away
  6. New Hampshire US4NH1BE - about 22 nm away

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.

Editions

Edition Published Metadata
1.7 Apr 17, 2026 metadata.json