NOAA S-57 chart cell
Florida Keys - Little Blackwater Sound and Manatee Bay
US4FL1HX
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 608
- S-57 layers
- 32
- Published
- Jan 29, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 25.50000° N
- South
- 25.20000° N
- West
- 80.70000° W
- East
- 80.40000° W
- Center
- 25.35000° N, 80.55000° W
- Bounds area
- 293 sq nm
- Feature density
- 2.0737 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 19
- Smallest layer
- 1
- Largest layer
- 114
- Area sq km
- 1,006
- Features per sq km
- 0.60459
- DEPARE Depth area 114
- DEPCNT Depth contour 104
- LNDARE Land area 80
- COALNE Coastline 75
- SLCONS Shoreline construction 56
- SBDARE Seabed area 26
- SEAARE Sea area 21
- RESARE 16
- BCNLAT Lateral beacon 14
- DAYMAR 14
- M_QUAL Data quality 14
- LAKARE 13
- LNDRGN Land region 13
- RIVERS River 10
- CTNARE Caution area 9
- BRIDGE 5
- SOUNDG Sounding 5
- BUAARE 2
- LNDMRK 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/US4FL1HX.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4FL1HX/1.1/US4FL1HX.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4FL1HX/1.1/US4FL1HX.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4FL1HX/1.1/US4FL1HX.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4FL1HX/1.1/US4FL1HX.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4FL1HX/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Jan 29, 2026 | metadata.json |