GCP Photogrammetric Target.

thingiverse

A Key Target Used for GCP Photogrammetry Purposes. The Hole in the Center of this Target is Perfectly Suited for Securing a Gps Rtk Trimble Mast or for Attaching it to the Ground with a Clamp. Simply Slice the STL File Using Your Preferred Slicer and Then Modify the Gcode Using the Prusa Printers Color Print Feature. This Will Allow You to Pause the Print Job at the Desired Height and Switch to the Desired Filament Color. To Achieve this, Start by Printing with White Filament, then Switch to Black Filament. Please Note that This Method Only Works if Your Printer Recognizes the M600 Command. Happy Printing and Enjoy Flying! RPAS AT WORK is a Registered Trademark of Develtech Sprl and its Associated Domain Names. Source: https://support.pix4d.com/hc/en-us/articles/202557489-Step-1-Before-Starting-a-Project-4-Getting-GCPs-on-the-field-or-through-other-sources-optional-but-recommended