We have a pretty good idea of farmland distribution in Europe and North America, but we have a lot to learn about other parts of the world. Of particular note is Africa, which is predicted to experience an explosion in agriculture in the coming decades.   The best data that we have so far are not incredibly accurate. They are prone to overestimating and underestimating farmland in various locations. Due to the wide range of error and the unreliability of the data, it can be difficult to understand key issues such as food security, or to ...