NOAA S-57 chart cell
Lake Michigan - Grand River; South End of Lake Huron - Sarnia
US2GRLAC
- Usage band
- General · code 2
- Current edition
- 1.0
- Features
- 173
- S-57 layers
- 37
- Published
- May 7, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 43.20000° N
- South
- 38.40000° N
- West
- 86.40000° W
- East
- 81.18800° W
- Center
- 40.80000° N, 83.79400° W
- Bounds area
- 68,250 sq nm
- Feature density
- 0.0025 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 4.7
- Smallest layer
- 1
- Largest layer
- 19
- Area sq km
- 234,090
- Features per sq km
- 0.00074
- RIVERS River 19
- LIGHTS Light 17
- BUAARE 14
- MAGVAR Magnetic variation 13
- RECTRC 13
- LNDMRK 11
- DEPARE Depth area 7
- LNDARE Land area 6
- DEPCNT Depth contour 5
- WRECKS Wreck 5
- BCNSPP Special purpose beacon 4
- BOYLAT Lateral buoy 4
- FOGSIG 4
- SOUNDG Sounding 4
- BCNLAT Lateral beacon 3
- BOYSPP Special purpose buoy 3
- CGUSTA 3
- COALNE Coastline 3
- LAKARE 3
- LNDRGN Land region 3
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/US2GRLAC.zip
- S-57 cell https://charts.openships.ai/noaa/s57/general/US2GRLAC/1.0/US2GRLAC.000
- GeoJSON https://charts.openships.ai/noaa/s57/general/US2GRLAC/1.0/US2GRLAC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/general/US2GRLAC/1.0/US2GRLAC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/general/US2GRLAC/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | May 7, 2026 | metadata.json |