EPSG
OSG Technical Report #10, February 2001.
2011-01-25
Geodesy, engineering survey, topographic mapping.
New Zealand - South Island - north of approximately 42°20'S - Nelson vertical CRS area.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "Nelson 1955", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "New Zealand - South Island - north of approximately 42°20'S - Nelson vertical CRS area.", "bbox": { "south_latitude": -42.44, "west_longitude": 171.82, "north_latitude": -40.44, "east_longitude": 174.46 }, "id": { "authority": "EPSG", "code": 5164 } }