Alex, is only for navigation and position, anti interference and nothing more, is not for Fotogrametry because the GPS data is obtain from normal GPS
"D-RTK is a high precision navigation and positioning system specially designed for DJI A3 series flight controllers. Using dynamic differential technology, it provides ultra-accurate, centimeter level 3D positioning. This enhanced accuracy over typical barometer, compass and GPS systems makes D-RTK essential for commercial, industrial and scientific applications where accuracy is imperative."
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