Ground Sample Distance (GSD)
Estimate nadir ground sample distance and image footprint for aerial, UAV, or satellite imaging. The model assumes a flat ground plane and a camera pointing straight down.
Imaging footprint
GSD
1.20 cm/px
0.0120 m/px
Footprint
72.0 x 48.0 m
0.346 hectares
Image size
6000 x 4000
pixels
Altitude and focal length set each ground pixel
Nadir imaging footprint
1.20 cm/pixel
120 m
72.0 m
48.0 m
One pixel on the ground
1.20 cm per pixel across a 72.0 x 48.0 m footprint
86.5 m
Nadir, flat-ground estimate
Open Source and Easy to Use Elsewhere
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.