ground sample distance

{{Short description|Distance between pixel centers in remote sensing}}

In remote sensing, ground sample distance (GSD) in a digital photo 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.{{cite web

| url = http://nzam.com/

| title = Frequently Asked Questions: What Is Ground Sample Distance?

| author = NZ Aerial Mapping Ltd

| year = 2009

| accessdate = 2009-07-25

| archive-url = https://web.archive.org/web/20181129164335/http://www.nzam.com/

| archive-date = 2018-11-29

| url-status = dead

}} GSD is a measure of one limitation to spatial resolution or image resolution, that is, the limitation due to sampling.{{cite book

| title = Surveillance and Reconnaissance Imaging Systems: Modeling and Performance Prediction

| author = Jon C. Leachtenauer and Ronald G. Driggers

| publisher = Artech House

| year = 2001

| isbn = 978-1-58053-132-0

| pages = 30–31

| url = https://books.google.com/books?id=f3zUKZZ_WjMC&dq=%22ground+sample+distance%22&pg=PA30

}}

GSD is also referred to as ground-projected sample interval (GSI) and is related to the 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/books?id=4hBTUY_2BMIC&dq=%22ground+sample+distance%22&pg=PA1392

}}