What is the oldest and huge specialized tourist information carrier?

tourist map is a kind of special map that reflects the location, outline, transportation, accommodation, recreation and other information of tourist destinations and scenic spots in the form of graphics, images and symbols. It is an important tool for tourists to travel and an important carrier for tourists to obtain information about tourist destinations. Tourism maps have a long history, which can be traced back to ancient travel maps. Nowadays, there are a huge number and various types, covering tourist destinations all over the world.