Land across Earth is covered with a variety of natural and human-made surfaces from misty bogs to concrete and steel cities. Those areas and how they grow, persist, decay or are used play major roles in the function and health of our planet and communities living on it. Understanding the role of land cover requires an ability to identify, classify, and properly define and measure its size or extent. Those measurements can provide information essential for managing water and agriculture, stopping disease spread, responding to wildfires, conserving ecosystems, and other important topics. NASA’s scientific platforms collect precisely those kinds of data to offer broad and deep insight into the diverse forms of land cover across Earth.