NOAA S-57 chart cell
Chesapeake Bay and Eastern Bay
US4MD1DD
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 6,333
- S-57 layers
- 55
- Published
- Jun 10, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 39.00000° N
- South
- 38.70000° N
- West
- 76.50000° W
- East
- 76.20000° W
- Center
- 38.85000° N, 76.35000° W
- Bounds area
- 253 sq nm
- Feature density
- 25.0644 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 115.1
- Smallest layer
- 1
- Largest layer
- 1,416
- Area sq km
- 867
- Features per sq km
- 7.30761
- COALNE Coastline 1,416
- SLCONS Shoreline construction 1,360
- DEPCNT Depth contour 648
- DEPARE Depth area 630
- LNDRGN Land region 618
- SBDARE Seabed area 317
- DAYMAR 129
- BCNLAT Lateral beacon 124
- OBSTRN Obstruction 114
- PILPNT 99
- SEAARE Sea area 91
- LNDARE Land area 82
- LIGHTS Light 80
- SOUNDG Sounding 59
- WRECKS Wreck 59
- M_QUAL Data quality 47
- RIVERS River 47
- OFSPLF 40
- BOYLAT Lateral buoy 38
- CTNARE Caution area 37
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/US4MD1DD.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MD1DD/1.0/US4MD1DD.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MD1DD/1.0/US4MD1DD.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MD1DD/1.0/US4MD1DD.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MD1DD/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jun 10, 2026 | metadata.json |