Tarragona is under controlled airspace, so you probably appeared on the local Aeroscope as there's an airport nearby. The ways of being busted are basically this:
You were naive enough to put your operator ID on the Fly App, so the drone was...
For RID to work properly, you need a dedicated receiver.
The app works on Android, but it's slow to get the package and only gets the every now and then, even with the drone flying at a few meters. Despite that, I've been able to pick my M3 at...
The Mavic 4 is about to be released, around April at most, it will basically replace the Mavic 3, else, you can go for a Mini 4.
The best image quality on foldable drones comes from the 4/3 of the M3, nothing else come close. The M3E with the...
Both the drone operator ID and the A1/A3 certificates are free. You need to get them from the webpage of the responsible for the aerial security of the country you intend to fly in. Once you got the operator ID and the A1/A3 certificate it works...
The only advantage of laser or SLS (which could also be a solution) vs photogrammetry is that it's faster on producing the 3D model, as it's basically on the fly.
Both commercial LIDAR and SLS solutions are heavy dependent on the calibration and...