Hi,
Tanks to all ! I have a right DEM with a good orientation.
It was due to the use of two differents coordinates systems (WGS84 for the camera and UTM33 for the GCPs) like you told me.
As I have uncked the coordinates of the camera, consequently Agisoft use only the GCPs to orientate the project and align photos, am I right ?
Then, I never used the orientation and the coordinates of the camera, do you think they are necessary ?