It's a map in which we stretched places, so that those areas which contain many people are drawn larger, and those areas, like the Sahara and the Himalayas, in which there are few people, have been shrunk away.
On y a agrandi certains endroits afin que ceux davantage peuplés paraissent plus grands, et ceux, comme le Sahara et l'Himalaya, qui sont peu peuplés, soient rétrécis.