TOOLS - GSD calculator Follow Click HERE to download the tool in Excel format.Click HERE to download the tool in Open Office format. Was this article helpful? 51 out of 59 found this helpful Related articles Ground sampling distance (GSD) How to compute the Site Calibration for GCPs in an Arbitrary Coordinate System Processing thermal images Example projects Generate a vegetation index Article feedback (for troubleshooting, post here) 2 comments Centro Nacional de Prevención de Desastres April 23, 2019 18:12 We have a phantom 4 and I entered that parameters as show in the picture, then we fly the drone and when we entered the flight height the app Pix4DCapture says GSD 5.5, so, the question is Why it does not say 0.77? Holden (Pix4D) April 23, 2019 19:43 Hi there. The camera database has the focal length of the Phantom 4 as 3.61, not 20. can you input the correct focal length to see what value is produced? Please sign in to leave a comment.