Data source: EPSG
Information source: Coordinating Committee on Great Lakes Basic Hydraulic and Hydrologic Data
Revision date: 2012-08-10
Scope: Hydrology.
Remarks: Dynamic heights. Adopted in 1962. Replaced by IGLD 1985 in January 1992.
Area of use: Canada and United States (USA) - Great Lakes basin and St Lawrence Seaway.
WGS84 bounds:
-54.75 40.99
-93.17 52.22
Definition: OGC Well Known Text
VERT_DATUM["International Great Lakes Datum 1955",2005, AUTHORITY["EPSG","5204"]]
Definition: OGC Well Known Text 2 (2019)
VDATUM["International Great Lakes Datum 1955", ID["EPSG",5204]]
Definition: ESRI Well Known Text
VDATUM["International_Great_Lakes_Datum_1955"]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/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 } }