{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"DatumEnsemble","name":"Greenland Mean Sea Level ","members":[{"name":"Greenland Mean Sea Level (2023)","id":{"authority":"EPSG","code":1387}},{"name":"Greenland Mean Sea Level (2025)","id":{"authority":"EPSG","code":1456}}],"accuracy":"0.5","id":{"authority":"EPSG","code":1458}}