{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"VerticalReferenceFrame","name":"Helsinki 1943","scope":"Geodesy, topographic mapping.","area":"Finland - onshore mainland south of approximately 66°N.","bbox":{"south_latitude":59.75,"west_longitude":20.95,"north_latitude":66.73,"east_longitude":31.59},"id":{"authority":"EPSG","code":1213}}