NOAA S-57 chart cell
Lake Superior - Keweenaw Peninsula; Lake Michigan - Green Bay
US2GRLBB
- Usage band
- General · code 2
- Current edition
- 1.1
- Features
- 1,889
- S-57 layers
- 56
- Published
- May 25, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 48.00000° N
- South
- 43.20000° N
- West
- 91.20000° W
- East
- 86.40000° W
- Center
- 45.60000° N, 88.80000° W
- Bounds area
- 58,094 sq nm
- Feature density
- 0.0325 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 33.7
- Smallest layer
- 1
- Largest layer
- 177
- Area sq km
- 199,258
- Features per sq km
- 0.00948
- LIGHTS Light 177
- DEPCNT Depth contour 150
- DEPARE Depth area 141
- LNDARE Land area 137
- RIVERS River 135
- RECTRC 108
- BUAARE 101
- LNDMRK 99
- COALNE Coastline 83
- BOYLAT Lateral buoy 79
- SEAARE Sea area 73
- SBDARE Seabed area 57
- LNDRGN Land region 56
- UWTROC Underwater rock 43
- FOGSIG 39
- WRECKS Wreck 33
- BCNSPP Special purpose beacon 30
- DAYMAR 30
- BCNLAT Lateral beacon 28
- BOYSPP Special purpose buoy 26
Nearby Chart Cells
General 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/US2GRLBB.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/general/US2GRLBB/1.1/US2GRLBB.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/general/US2GRLBB/1.1/US2GRLBB.001
- GeoJSON https://charts.openships.ai/noaa/s57/general/US2GRLBB/1.1/US2GRLBB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/general/US2GRLBB/1.1/US2GRLBB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/general/US2GRLBB/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | May 25, 2026 | metadata.json |