one-dimensional spatial region Ground Track https://en.wikipedia.org/w/index.php?title=Ground_track&oldid=1058025510 https://www.commoncoreontologies.org/GeospatialOntology A One-Dimensional Spatial Region defined by the line formed on the surface of an Astronomical Body by projecting an imaginary line from the center of the tracked Object to the center of the Astronomical Body as the Object travels above the surface. Ground Trace The Ground Track is the line on the surface of the Earth or other Astronomical Body that is located directly below the Object Track.