EPSG
Coordinating Committee on Great Lakes Basic Hydraulic and Hydrologic Data
2012-08-10
Hydrology.
Dynamic heights. Adopted in 1962. Replaced by IGLD 1985 in January 1992.
Canada and United States (USA) - Great Lakes basin and St Lawrence Seaway.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "International Great Lakes Datum 1955", "scope": "Hydrology.", "area": "Canada and United States (USA) - Great Lakes basin and St Lawrence Seaway.", "bbox": { "south_latitude": 40.99, "west_longitude": -93.17, "north_latitude": 52.22, "east_longitude": -54.75 }, "id": { "authority": "EPSG", "code": 5204 } }