From the dataset abstract

Arsenic risk areas in Tampere. Data is available in WMS and WFS APIs which provide data in different formats (e.g. JSON, GML2, Shape-zip, CSV). Native coordinate system is ETRS-GK24...

Source: Tampereen arseeniriskialueet

Additional Information

Field Value
Format GEOJSON
Coordinate system ETRS-GK24 (EPSG:3878)