NOAA S-57 chart cell
Chesapeake Bay - North Beach to Annapolis
US4MD1DC
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,903
- S-57 layers
- 51
- Published
- Jun 10, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 39.00000° N
- South
- 38.70000° N
- West
- 76.80000° W
- East
- 76.50000° W
- Center
- 38.85000° N, 76.65000° W
- Bounds area
- 253 sq nm
- Feature density
- 7.5316 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 37.3
- Smallest layer
- 1
- Largest layer
- 522
- Area sq km
- 867
- Features per sq km
- 2.19586
- SLCONS Shoreline construction 522
- COALNE Coastline 438
- LNDRGN Land region 180
- DEPARE Depth area 77
- DEPCNT Depth contour 75
- RIVERS River 74
- PILPNT 57
- DAYMAR 43
- SEAARE Sea area 43
- BCNLAT Lateral beacon 41
- SBDARE Seabed area 37
- OBSTRN Obstruction 36
- LIGHTS Light 32
- BUAARE 31
- M_QUAL Data quality 23
- CTNARE Caution area 20
- LNDARE Land area 20
- SOUNDG Sounding 20
- WRECKS Wreck 20
- LNDMRK 13
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/US4MD1DC.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MD1DC/1.0/US4MD1DC.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MD1DC/1.0/US4MD1DC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MD1DC/1.0/US4MD1DC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MD1DC/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jun 10, 2026 | metadata.json |