Its redesigned maps have also come to Norway, Sweden and Finland: see AppleInsider, Justin O’Beirne and MacRumors for details.

Beneath Our Feet: Mapping the World Below opened last Friday at the Boston Public Library’s Norman B. Leventhal Map Center and runs until 25 February 2018. The theme: subsurface mapping. “In this exhibition, you will see how ancient Romans carved vast underground catacombs, how minerals and natural resources have been studied, engineered and transported since the 19th century, how today’s scientific and cartographic advancements have enabled us to picture the entire ocean floor, and what lies below the streets of Boston.”

Finland in Ancient Cartography, an exhibition marking the 100th anniversary of Finland’s independence, is being hosted by the National Archives of Finland in Helsinki, in cooperation with the Embassy of Italy in Finland and the Italian Institute of Culture. “The exhibition focuses on the depiction of Finland and offers a journey through ancient cartography history and the representation of the country from the sixteenth to the twentieth century. It places special emphasis on satirical cartography between the end of nineteenth century and the First World War, as these periods are strictly connected to Finnish independence. More than 40 maps from the Gianni Brandozzi Collection and the National Archives are displayed.” Opened 21 September; runs until 17 November. [WMS]

Lauri Vanhala wanted to figure out the best place to buy an apartment in Helsinki, so he built an interactive sort-of-isochrone map of the city. He explains: “I calculated the travel time from every address to every other address in Helsinki around 7:30-8:00am (about 30 billion searches total!). Then I calculated the (weighted) average travel time to anywhere in the city, using amount of jobs in the target area as weight.” [OSM]