Ground sample distance
Introduction In remote sensing, '''ground sample distance''' ('''GSD''') in a digital photo (such as an orthophoto) of the ground from air or space is the distance between pixel centers measured on the ground. For example, in an image with a one-meter GSD, adjacent pixels image locations are 1 meter apart on the ground. GSD is a measure of one limitation to spatial resolution or image resolution, that is, the limitation due to sampling.GSD is also referred to as '''ground-projected sample interval''' ('''GSI''') or '''ground-projected instantaneous field of view''' ('''GIFOV''').
See also * Geographic distance
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