Talk:Ground sample distance

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Definition

This definition is wrong. GSD measures linear distance. It is not area-based. That is why it is measured in meters, for example, and not square meters.

GSD is the distance on the ground between two projected pixel centers. — Preceding unsigned comment added by 128.115.27.11 (talk • contribs) 19:11, 11 November 2011‎

The above editor corrected this: [1]. —Mrwojo (talk) 15:46, 13 November 2015 (UTC)[reply]

No source for incorrect line, think it should be removed

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

Ground sample distance is NOT the same as ground-projected sample interval, nor is it the same as ground-projected instantaneous field of view. These are three different concepts. Although they are related, they are not the same. In my years in remote sensing, I've never heard people refer to them as the same (except for those who are new and don't quite know what they're saying). — Preceding unsigned comment added by Skyturnrouge (talk • contribs) 04:35, 14 January 2020 (UTC)[reply]

Correction

After some more research, even the couple of textbooks I have here say that they are often interchanged. But they are different, I think it should be at least hinted as such so that readers don't think that they are the same. Skyturnrouge (talk) 04:51, 14 January 2020 (UTC)[reply]