“An interactive map showing areas threatened by sea level rise and coastal flooding. Combining the most advanced global model of coastal elevations with the latest projections for future flood levels. Flood maps are only as good as the elevation data they’re founded on. We used machine learning to develop CoastalDEM ®, a high-accuracy digital elevation model (DEM) for coastal areas, now updated to version 2.1. Read more. Climate change science is constantly evolving. Our maps are based on the latest sea-level projections, including those from the recently released Sixth Assessment Report (AR6) from the Intergovernmental Panel on Climate Change (IPCC) and the 2022 Sea Level Rise Technical Report from an interagency U.S. government task force. Using CoastalDEM to model land elevation outside the U.S., our maps help screen for coastal flood risk in parts of the world where top-accuracy elevation data based on airborne lidar is unavailable. or mapping coastal flood risk within the U.S., we use high-resolution airborne lidar data collected by the National Oceanic and Atmospheric Administration (NOAA).”