{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"VerticalReferenceFrame","name":"Chart Datum Portugal ","scope":"Hydrography and nautical charting.","area":"Portugal - offshore.","bbox":{"south_latitude":29.24,"west_longitude":-35.58,"north_latitude":43.07,"east_longitude":-7.25},"id":{"authority":"EPSG","code":1361}}