There exists a considerable body of scholarly literature on the contributions of the Jesuit missionaries of the seventeenth and eighteenth centuries to the knowledge of geography in China. Much of this literature is centred around the world maps of Matteo Ricci. Studies have been made on the different editions of these maps, on the sources of information (both European and Chinese) that Ricci must have used, on the reception by the Chinese literati of Ricci's time of the maps and the world-view represented by them, and on the possible influence of Renaissance cartography on Chinese map-making. Writers differ on the importance and utility of these maps and their influence.