Ground Control Point Targets

EDIT: Please don't boost this model - Makerworld removed it from the exclusive program as deemed it too simple to qualify, and me being outside of markerworld store regions i can't cash in non exclusive points for filament etc. It leaves me unable to benefit from any boost for my design work on this model. If you like this model and want to show some appreciation please boost some of my other work. Much appreciated! These 20cm x 20cm ground control point targets are great for placing ground control into drone images for photogrammetry, with apps like WebODM, Pix4d, Reality Capture etc. They are clearly visible at 30m flight altitude and have a dimple in the middle to help with GNSS pole placement when capturing position. I've also used double sided tape to put them on vertical surfaces and used them as scan targets for registering laser scans in RealWorks and Cyclone3DR