Ground sample distance

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 that are 1 meter apart on the ground.[1] GSD is a measure of one limitation to image resolution, that is, the limitation due to sampling.[2]

GSD is also referred to as ground-projected sample interval (GSI) or ground-projected instantaneous field of view (GIFOV).[3]

References

  1. ^ NZ Aerial Mapping Ltd (2009). "Frequently Asked Questions: What Is Ground Sample Distance?". http://www.nzam.com/faq.asp?id=faq_gsd. Retrieved 2009-07-25. 
  2. ^ Jon C. Leachtenauer and Ronald G. Driggers (2001). Surveillance and Reconnaissance Imaging Systems: Modeling and Performance Prediction. Artech House. pp. 30–31. ISBN 9781580531320. http://books.google.com/books?id=f3zUKZZ_WjMC&pg=PA30&dq=%22ground+sample+distance%22&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_brr=0&ei=57prSuTtN47ilASH0dlQ. 
  3. ^ Ronald G. Driggers (2003). Encyclopedia of Optical Engineering. CRC Press. p. 1392. ISBN 9780824742515. http://books.google.com/books?id=4hBTUY_2BMIC&pg=PA1392&dq=%22ground+sample+distance%22&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_brr=0&ei=57prSuTtN47ilASH0dlQ.