NAVD 88, or the North American Vertical Datum of 1988, is a standard used in the United States and Canada for measuring elevation. It provides a consistent reference point for determining the height of land features, such as mountains and valleys, relative to sea level. This datum is crucial for various applications, including engineering, construction, and floodplain management. The NAVD 88 system was established to replace the older NGVD 29, or National Geodetic Vertical Datum of 1929, which had inconsistencies. By using precise measurements and modern technology, NAVD 88 offers improved accuracy for elevation data, benefiting scientists, surveyors, and planners.