From the dataset abstract

Georeferenced printed map. 1:20 000. The map is based on aerial photographs from 1956. API address: WMS: https://kartat.espoo.fi/teklaogcweb/wms.ashx API description (in Finnish):...

Source: Espoon kartta vuodelta 1958

Additional information

Field Value
Format WMS
Coordinate system ETRS-GK25