NOAA S-57 chart cell
Chesapeake Bay - Rocky Point to Tilghman Island
US4MD1CD
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 3,481
- S-57 layers
- 51
- Published
- Jun 17, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 38.70000° N
- South
- 38.40000° N
- West
- 76.50000° W
- East
- 76.20000° W
- Center
- 38.55000° N, 76.35000° W
- Bounds area
- 254 sq nm
- Feature density
- 13.7192 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 68.3
- Smallest layer
- 1
- Largest layer
- 921
- Area sq km
- 870
- Features per sq km
- 3.99989
- COALNE Coastline 921
- LNDRGN Land region 594
- SLCONS Shoreline construction 423
- DEPCNT Depth contour 345
- DEPARE Depth area 335
- SBDARE Seabed area 237
- OBSTRN Obstruction 85
- RIVERS River 64
- PILPNT 51
- LNDARE Land area 44
- SEAARE Sea area 39
- LIGHTS Light 35
- WRECKS Wreck 33
- SOUNDG Sounding 32
- DAYMAR 29
- BCNLAT Lateral beacon 27
- BOYLAT Lateral buoy 23
- M_QUAL Data quality 19
- WEDKLP 16
- OFSPLF 15
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/US4MD1CD.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4MD1CD/1.1/US4MD1CD.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4MD1CD/1.1/US4MD1CD.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MD1CD/1.1/US4MD1CD.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MD1CD/1.1/US4MD1CD.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MD1CD/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Jun 17, 2026 | metadata.json |