Using the Canon SX260 SX280 HS.XML Camera setting when planning a mapping route - I’m using an altitude of 100m here… I get a footprint of 101 x 137m and a resolution of 1.15cm/px - 50% overlap gives me 68.6m between images, and sidelap, 40.4m at 60%
However - I question these numbers heavily.
A footprint of 137m at 1.15cm/pixel would be 9133 pixels long. The SX260Hs is only 4000 x 3000 pixels
This calculator - aerogis.de/eng/gsdcalculator.html - using sensor size of 6.17mm, focal length of 5mm, image cols of 4000, image rows of 3000 and altitude of 100m gives me a resolution of 3.08cm
My own spreadsheet ( download https://www.dropbox.com/s/7gnlaf95wqb%20ib03/many%20cameras%20resolution%20test.xlsx ) also spits out 3.1cm/pixel with a footprint of 122.4 x 91.8 meters.
What gives? I’m assuming DroidPlanner is getting something wrong here?