The Great Lakes Mapping Act of 2025 aims to improve our understanding of the lakebeds in the Great Lakes by directing the National Oceanic and Atmospheric Administration (NOAA) to conduct detailed surveys and mapping. The primary goal is to create high-resolution maps of these lakebeds, which can be essential for various environmental and resource management purposes. Key provisions of the Act include a requirement for NOAA to complete the mapping by December 31, 2030.