The North American Vertical Datum of 1988 (NAVD 88) is a geodetic datum used as a reference for measuring elevations in North America. It was established to provide a consistent vertical reference across the continent, replacing the older National Geodetic Vertical Datum of 1929 (NGVD 29). NAVD 88 is based on a network of survey benchmarks and uses a specific point in Quebec, Canada as its reference. NAVD 88 is crucial for various applications, including engineering, construction, and floodplain management. It helps ensure that elevation data is accurate and comparable across different regions, facilitating better planning and safety measures in areas prone to flooding or other elevation-related issues.