TIFF file

From the dataset abstract

Map of the City of Helsinki from 1925 prepared by the Town Planning Department of the City of Helsinki Construction Office. The map shows public buildings, built and non-built areas, parks, plantings and tram lines.

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

Source: Helsingin kaupungin kartta vuodelta 1925