Dataset - Helsinki Region Infoshare

Vastaa avoimen datan tarvekyselyyn: https://hri.fi/fi/mita-toivot-avoimelta-datalta-tulevaisuudessa/

Historical maps of Vantaa

Various historical maps of Vantaa. For more information on the different maps, see the Descriptions of layers list. The material can be viewed on the city of Vantaa map service:...
- WMS
Fortifications of First World War in Helsinki

The dataset depicts the first World War-era fortifications, as well as some details of the fortifications. The data is based on a survey commissioned by the Public Works...
- WMS
- WFS
Historical detailed plan maps of the city of Helsinki

Old detailed plans of Helsinki. The detailed plan maps for years 1820, 1838 and 1878 can be downloaded as TIFF-files. The guidemaps for all years can be found through WMS API....
- TIFF
- WMS

You can also access this registry using the API (see API Docs).