latitude and longitude coordinate pair LatLongPair A data set that comprises exactly one latitude measurement datum and exactly one longitude measurement datum as its elements, and optiionally the geodetic datum used as the coordinate system for the measurements, and each of these measurements is about the same zero-dimensional geographical region. William R. Hogan Matthew Diller A data set that comprises exactly one latitude measurement datum and exactly one longitude measurement datum as its elements, and optiionally the geodetic datum used as the coordinate system for the measurements, and each of these measurements is about the same zero-dimensional geographical region. geodetic datum