This map shows only geolocalized tweets. Usually, tweets are geolocalized when they are sent with a mobile. Also twitter stream don't send 100% of the tweets,

This map shows only geolocalized tweets. Usually, tweets are geolocalized when they are sent with a mobile. Also twitter stream don't send 100% of the tweets, it will be to huge. But statically speaking, it should be enough to have a good picture. May be there are some restrictions in Canada. This map give us a lot of information about twitter more than the first fun and wow effect. I like that!