metre
International Great Lakes Datum 1955
EPSG
Coordinating Committee on Great Lakes Basic Hydraulic and Hydrologic Data
2021-05-13
Hydrology.
Replaces several earlier systems. Replaced by IGLD 1985 (CRS code 5609).
Canada and United States (USA) - Great Lakes basin and St Lawrence Seaway.
46.61 -73.96
40.99 -93.17
52.22 -54.75
-93.17 40.99
-54.75 52.22
Definition: OGC Well Known Text 2 (2019)
VERTCRS["IGLD 1955 height", VDATUM["International Great Lakes Datum 1955"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]], USAGE[ SCOPE["Hydrology."], AREA["Canada and United States (USA) - Great Lakes basin and St Lawrence Seaway."], BBOX[40.99,-93.17,52.22,-54.75]], ID["EPSG",5608]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalCRS", "name": "IGLD 1955 height", "datum": { "type": "VerticalReferenceFrame", "name": "International Great Lakes Datum 1955" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] }, "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": 5608 } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+vunits=m +no_defs +type=crs"> <Layer srs="+vunits=m +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 5608, 'EPSG', 5608, '+vunits=m +no_defs +type=crs', 'VERT_CS["IGLD 1955 height",VERT_DATUM["International Great Lakes Datum 1955",2005,AUTHORITY["EPSG","5204"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5608"]]');