Map of study area (IMAGE) NASA/Goddard Space Flight Center Caption The team focused on the dryland regions of West Africa, including the arid south side of the Sahara Desert, stretching through the semi-arid Sahel Zone and into the humid sub-tropics. By studying a variety of landscapes from few trees to nearly forested conditions, the team trained their computing algorithms to recognize trees across diverse terrain types, from deserts in the north to tree savannas in the south. Download related video in HD formats: https://svs.gsfc.nasa.gov/4865 Credit NASA's Scientific Visualization Studio; Blue Marble data is courtesy of Reto Stockli (NASA/GSFC) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.