NOAA S-57 chart cell
Choptank River
US4MD80M
- Usage band
- Approach · code 4
- Current edition
- 10.0
- Features
- 389
- S-57 layers
- 33
- Published
- Feb 4, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 39.05513° N
- South
- 38.38314° N
- West
- 76.16437° W
- East
- 75.77039° W
- Center
- 38.71913° N, 75.96738° W
- Bounds area
- 745 sq nm
- Feature density
- 0.5224 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 11.8
- Smallest layer
- 1
- Largest layer
- 147
- Area sq km
- 2,554
- Features per sq km
- 0.15231
- COALNE Coastline 147
- LNDRGN Land region 67
- SLCONS Shoreline construction 58
- DEPARE Depth area 18
- DEPCNT Depth contour 17
- SEAARE Sea area 10
- RIVERS River 9
- BRIDGE 6
- LNDARE Land area 6
- BUAARE 5
- M_QUAL Data quality 5
- OBSTRN Obstruction 5
- LIGHTS Light 4
- LNDMRK 3
- PILPNT 3
- SOUNDG Sounding 3
- BOYLAT Lateral buoy 2
- DAYMAR 2
- M_COVR Coverage 2
- MAGVAR Magnetic variation 2
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/US4MD80M.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MD80M/10.0/US4MD80M.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MD80M/10.0/US4MD80M.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MD80M/10.0/US4MD80M.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MD80M/10.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 10.0 | Feb 4, 2026 | metadata.json |