In remote sensing, ground sample distance (GSD) is the spacing of areas represented by each pixel in a digital photo (such as an orthophoto) of the ground from air or space. For example, in an image with a one-metre GSD, each pixel represents a ground area of 1 square metre.[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
- ^ NZ Aerial Mapping Ltd (2009). "Frequently Asked Questions: What Is Ground Sample Distance?". http://www.nzam.com/faq.asp?id=faq_gsd. Retrieved on 2009-07-25.
- ^ 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.
- ^ 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.
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