They show the distribution of 19 land cover types across the North America in 2010 (left) and 2015 (right). But analysis of the changes shows some dramatic differences across five years: nearly 600,000 square kilometers (2.8 percent of North America) changed. The amount of forested land, wetlands, water bodies, and snow and ice decreased, while shrubland, grassland, cropland, barren land, and urban land cover increased. It also means standardizing the land cover classification scheme for all three countries. “The NALCMS group produces the best available land cover products for North America to date,” Jafry said.