Apologies if this is a stupid question, but I’m quite new to cameras/drone cameras! Does anyone know how you extract the true sensor diameters and focal length of a drone’s camera from the specs listed on the DJI website as I understand these are standardised? I’m trying to calculate Ground Sampling Distance for the Mavic 2 Pro and the Mavic 2 Enterprise Advanced at different altitudes and the values I’m getting are a lot smaller than I expected and so I think I must have the wrong values for sensor width and focal length (or gone wrong somewhere else). Thanks very much for any help in advance! Below are the values I’m currently using…
GSD = (sensor width (mm) x altitude (m) x 100)/(focal length (mm) x image width (pixels))
Mavic 2 Pro:
Sensor width = 13.2mm, focal length = 28mm, image width = 5472 pixels
GSD at 40m = 0.3446 cm/pixel
Mavic 2 Enterprise Advanced:
Sensor width = 6.4mm, focal length = 24mm, image width = 8000 pixels
GSD at 40m = 0.1333cm/pixel
Values sourced from DJI website (see links below) and then I’ve attempted to adjust them to true values based on some reading I did online but I’d imagine I may well have got this wrong.
M2P: Mavic 2 - Product Information - DJI
M2EA: Mavic 2 Enterprise Advanced - Specs - DJI
Thanks very much again!
GSD = (sensor width (mm) x altitude (m) x 100)/(focal length (mm) x image width (pixels))
Mavic 2 Pro:
Sensor width = 13.2mm, focal length = 28mm, image width = 5472 pixels
GSD at 40m = 0.3446 cm/pixel
Mavic 2 Enterprise Advanced:
Sensor width = 6.4mm, focal length = 24mm, image width = 8000 pixels
GSD at 40m = 0.1333cm/pixel
Values sourced from DJI website (see links below) and then I’ve attempted to adjust them to true values based on some reading I did online but I’d imagine I may well have got this wrong.
M2P: Mavic 2 - Product Information - DJI
M2EA: Mavic 2 Enterprise Advanced - Specs - DJI
Thanks very much again!