{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"VerticalCRS","name":"Piraeus height","datum":{"type":"VerticalReferenceFrame","name":"Piraeus Harbour 1986"},"coordinate_system":{"subtype":"vertical","axis":[{"name":"Gravity-related height","abbreviation":"H","direction":"up","unit":"metre"}]},"scope":"Geodesy, engineering survey.","area":"Greece - onshore.","bbox":{"south_latitude":34.75,"west_longitude":19.57,"north_latitude":41.75,"east_longitude":29.69},"id":{"authority":"EPSG","code":5716}}