NAD 27 (North American Datum 1927)

NAD 27 (North American Datum 1927) is a coordinate system used to represent locations on the Earth's surface. It was created in 1927 based on a reference point in Kansas and served as the standard for mapping in North America. NAD 27 helps mapmakers and surveyors specify exact positions for features like roads and boundaries. However, because the Earth’s shape varies and technology improved, NAD 27 has been largely replaced by more accurate systems like NAD 83. Nonetheless, NAD 27 remains important historically and for understanding older maps and data.