NOAA S-57 chart cell
New Hampshire
US4NH1BF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 153
- S-57 layers
- 19
- Published
- Jun 6, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 43.20000° N
- South
- 42.90000° N
- West
- 70.20000° W
- East
- 69.90000° W
- Center
- 43.05000° N, 70.05000° W
- Bounds area
- 237 sq nm
- Feature density
- 0.6453 / sq nm
Chart Statistics
19 largest layers shown
- Average features per layer
- 8.1
- Smallest layer
- 1
- Largest layer
- 58
- Area sq km
- 813
- Features per sq km
- 0.18815
- DEPCNT Depth contour 58
- DEPARE Depth area 46
- SOUNDG Sounding 12
- SBDARE Seabed area 7
- M_QUAL Data quality 6
- SEAARE Sea area 6
- WRECKS Wreck 4
- M_NPUB 2
- TSSLPT 2
- CONZNE 1
- DMPGRD 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- MAGVAR Magnetic variation 1
- RESARE 1
- TESARE 1
- TSEZNE 1
- TSSBND 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/US4NH1BF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4NH1BF/1.0/US4NH1BF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4NH1BF/1.0/US4NH1BF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4NH1BF/1.0/US4NH1BF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4NH1BF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jun 6, 2024 | metadata.json |