NOAA S-57 chart cell
New Hampshire
US4NH1BG
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 83
- S-57 layers
- 17
- Published
- Jun 6, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 43.20000° N
- South
- 42.90000° N
- West
- 69.90000° W
- East
- 69.60000° W
- Center
- 43.05000° N, 69.75000° W
- Bounds area
- 237 sq nm
- Feature density
- 0.3501 / sq nm
Chart Statistics
17 largest layers shown
- Average features per layer
- 4.9
- Smallest layer
- 1
- Largest layer
- 29
- Area sq km
- 813
- Features per sq km
- 0.10207
- DEPCNT Depth contour 29
- DEPARE Depth area 25
- SOUNDG Sounding 5
- M_QUAL Data quality 4
- SEAARE Sea area 4
- M_NPUB 2
- MAGVAR Magnetic variation 2
- SBDARE Seabed area 2
- WRECKS Wreck 2
- CONZNE 1
- DMPGRD 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- RESARE 1
- TSSBND 1
- TSSLPT 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/US4NH1BG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4NH1BG/1.0/US4NH1BG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4NH1BG/1.0/US4NH1BG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4NH1BG/1.0/US4NH1BG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4NH1BG/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jun 6, 2024 | metadata.json |