Відео

+1

Hello. In most cases you'll find this information on the website of your lokal surveying authority. You can also use global geoid files (EGM96, better EGM2020), but they are less acurate (~1m).

Coordinate system in the EXIF header of the photos is WGS84. So you have to set it to WGS84 in the project properties first. But in a next step you can convert them to a lokal coordinate system, normally to the project coordinate system (in my case ETRS89, UTM33 with GCG2016 Geoid).

@@martinkiskemper1395 what your RTK network giving you corrections in WSG84?

The coordinates and heights of the photos are defined on the the WGS84-ellipsoid, so they are ellipsoidical heights. When converting to ETRS89-UTM with GCG2016 undulation the heights of the photos will shifted from ellipsoid to geoid. (Here in this region about 38m.)

@@martinkiskemper1395 I appreciate your help

@@martinkiskemper1395 Is it necessary that the GCP and the photo will be in the same coordinate system in order to optimize the photo of the drone ?

@@יובלמיכלסון I think, it is not necessary, because the transformation parameters are known, but I always do it to easily check the flight altitude. And it is just one click. Optimizing the camera will calculate the camera parameters, like focal length, coordinates of center pixel and distortion correction parameters.

@@martinkiskemper1395 got it.thank you for your help

Accuracy is 0.02m (not 0.02cm). I use a Leica GS15 or Trimble R12i with SAPOS reference station service. I think with the Emlid RS2+ in combiantion with SAPOS or another reference station service it is also possible to get the same accuracy.