Datasets Change history Datasets Water supply service area of Helsinki Region Environmental Services (HSY) In its area of operation, HSY provides for the distribution and sewage drainage of domestic water in accordance with the needs of community development. Within the water supply... WFS WMS SHP TAB Carbon sink mapping of Helsinki metropolitan area Carbon Sink Mapping of Helsinki Metropolitan Area. The data contains a report (in Finnish) and a GIS dataset. The GIS dataset shows the carbon storage in both soil and... WMS WFS