WMS API

From the dataset abstract

Map of the City of Helsinki from 1925. The map shows the city districts and quarters, public buildings, built and non-built areas, parks and plantings. The railway and the city’s 12 tram lines can also be seen on the map.

The map scale is 1:8,000 (?) and the image resolution is 300 dpi.

The map can be downloaded as TIFF-file and used through WMS API.

The map can be viewed in the Helsinki map service

Coordinate systems:

• Maintained in ETRS-GK25 (EPSG:3879), can be projected to other coordinate systems. See GetCapabilities query for other possible coordinate systems.

API addresses:

• WMS API: https://kartta.hel.fi/ws/geoserver/avoindata/wms

Layers:

• Helsingin_kaupungin_kartta_1925 (Map of Helsinki in 1925)

Source: Helsingin kaupungin kartta vuodelta 1925