{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"VerticalCRS","name":"Baltic 1957 depth","datum":{"type":"VerticalReferenceFrame","name":"Baltic 1957"},"coordinate_system":{"subtype":"vertical","axis":[{"name":"Depth","abbreviation":"D","direction":"down","unit":"metre"}]},"scope":"Geodesy, engineering survey, topographic mapping.","area":"Czechia; Slovakia.","bbox":{"south_latitude":47.73,"west_longitude":12.09,"north_latitude":51.06,"east_longitude":22.56},"id":{"authority":"EPSG","code":8358}}