When we look at a map of Los Angeles or London, it is hard to believe that as of 2005, only 15 percent of the world was mapped to a geo-codable level of detail.
当我们看洛杉矶，伦敦的地图时 让人难以置信的是 截止到2005年全世界只有15%的地方 有精确地图可供地理软件使用