Finding the 'invisible' millions who are not on maps July 02, 2020 at 04:11PMhttps://https://ift.tt/2NSUeQ1 How open map data is filling in the world's missing maps and helping trace the spread of disease.

How open map data is filling in the world's missing maps and helping trace the spread of disease.

from BBC News - World https://ift.tt/38yEwDv