NAD83, or the North American Datum of 1983, is a geodetic datum used for mapping and navigation in North America. It provides a standard framework for measuring locations on the Earth's surface, ensuring that coordinates are consistent across different maps and GPS systems. This datum is crucial for various applications, including land surveying, environmental studies, and infrastructure development. The NAD83 system is based on a network of ground control points and satellite data, making it more accurate than its predecessor, NAD27. By using NAD83, professionals can confidently share and analyze geographic information, leading to better decision-making in fields like urban planning and disaster management.