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
In physics and geosciences, the term spatial resolution refers to distance between independent measurements, or the physical dimension that represents a pixel of the image. While in some instruments, like cameras and telescopes, 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).
[{{cite book
, title = Encyclopedia of Optical Engineering
, author = Ronald G. Driggers
, publisher = CRC Press
, year = 2003
, isbn = 978-0-8247-4251-5
, page = 1392
, url = https://books.google.com/?id=4hBTUY_2BMIC&pg=PA1392&dq=%22ground+sample+distance%22
]
See also
*
Geographic distance
References
Aerial photography
Photogrammetry
Satellite imagery