NOAA S-57 chart cell
New Hampshire
US4NH1BC
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 192
- S-57 layers
- 24
- Published
- Jun 6, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 43.20000° N
- South
- 42.90000° N
- West
- 71.10000° W
- East
- 70.80000° W
- Center
- 43.05000° N, 70.95000° W
- Bounds area
- 237 sq nm
- Feature density
- 0.8098 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 8
- Smallest layer
- 1
- Largest layer
- 83
- Area sq km
- 813
- Features per sq km
- 0.23611
- RIVERS River 83
- COALNE Coastline 28
- LNDRGN Land region 19
- LNDARE Land area 9
- CBLOHD 6
- DEPARE Depth area 6
- RESARE 5
- SEAARE Sea area 5
- BRIDGE 4
- BUAARE 4
- M_QUAL Data quality 4
- CTNARE Caution area 3
- UWTROC Underwater rock 3
- DEPCNT Depth contour 2
- SBDARE Seabed area 2
- LAKARE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MAGVAR Magnetic variation 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/US4NH1BC.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4NH1BC/1.0/US4NH1BC.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4NH1BC/1.0/US4NH1BC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4NH1BC/1.0/US4NH1BC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4NH1BC/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jun 6, 2024 | metadata.json |